Seems to have been mostly anonymous, I could only find one newspaper article that gave any names.
In The Western Times, 28th January 1949 -
Totnes —Ashburton Line To Continue
....Totnes Rural Council learnt, on Friday, from a letter from Mr. K. W. C. Grand, chief regional officer of British Railways, Paddington, that there was at present no intention of closing down the Totnes- Ashburton branch line.
....Mr. Grand stated that the Railway Executive had decided on a general review of branch line services to see where existing facilities were justified where support was consistently disappointing Due regard was being paid to alternative transport facilities and inconvenience likely to be caused While it could be confirmed there was no intention of closing Ashburton line at present, the matter was one to be considered. Representa tions from the council would be carefully borne in mind.
....It was agreed to ask for good notice of any further suggestion of closing the line.
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In The Dundee Courier, 3rd December 1949 -
MORE BRANCH LINES MAY CLOSE
....Recent withdrawals and changes of transport facilities in Scotland were the subject of statements by the British Transport Commission yesterday to the Scottish Transport Users' Consultative Committee in Edinburgh.
....Mr Neil S. Beaton, the chairman, said that a great deal of criticism had been levelled against nationalised transport. He believed, however, that the services had in many ways improved. Staff relations were better, and passenger and freight trains were running better to time.
....Claims against railway losses were down by £1 million, as against 1948. The savmg had been accomplished by extra security measures.
....Regarding withdrawal of branch-line services, the commission stated that, in view of the serious loss entailed, in spite of the inducement of cheap day fares, they had been obliged to call for a review of the need to continue providing a service on certain branch lines.
....In many cases the receipts had fallen to a quarter of the minimum necessary for safe operation. This trend was also manifest before the war, when the railway companies were already closing down unprofitable sections.
CONSULTATION PROMISED
....Sir lan Bolton, Scottish member of the commission, afterwards said the revision of branch-line services was going on throughout Britain, but always with regard to local needs.
....In no case would a branch line be closed down without consultation with local authorities and other interested parties.
....Regarding the Clyde and Campbeltown cargo services, the commission's statement pointed out that freight traffic was now being operated by road vehicles to the mainland.
....Even the rearrangement of services would incur a considerable loss. The commission was responsible under the Act for securing that their revenue was sufficient to meet all charges.
....The whole problem of providing transport for these outlying counties on an economic basis was difficult. The commission felt that the arrangement to meet the position created by the decision of the Clyde Company to cease operations was sound, provided the necessary support was forthcoming.
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This is the only article I've found that gives possible names. In The Dundee Courier, 3rd May 1950 -
FIFERS FIGHT TO KEEP RAIL LINE
....Cupar District Council and Fife Planning Committee are to press their protest against the decision to close the North of Fife branch railway line between Newburgh and Dundee on June 5.
....In Cupar yesterday representatives met three officials of the Railway Executive, Mr C. J. H. Selfe, Mr Simpson, and Mr J. M'Master.
....Mr R. L. Christie. Kennoway, planning convener for the county, maintained that though the line did not pay, that was no basis on which to cut it off.
....In 1897, when the L.N.E.R. took over from the North Fife Railway Company, they undertook to keep the line running in perpetuity. Now that a temporary economic blizzard had come along it had been decided to wipe the line out.
....People were going.to lose their jobs and the farmers were going to be let down. The original obligation still existed morally, and the railways were responsible for keeping the services going until a suitable alternative was found.
TWO PASSENGERS
....Mr Selfe said it looked as if the people had already chosen their alternative form of transport as the rate of passenger travel on the line had already fallen as low as two per train.
....Lieut.-Comdr. H. Hutchison-Bradburne, Cunnoquhie, said people were driven to give their patronage to other transport. It was getting to the point where nobody could afford the luxury of travel by rail. If the Executive's reasoning was carried to its logical conclusion there would soon be no train service in the country.
....Mr J. Alston, Lochmalony, said the railway officials did not claim that the goods handled by them on this line were not profitable. Seed potatoes alone, which were mostly destined for England, were a regular source of income, as was sugar beet, grain, and livestock.
....The tax revenue from the district must be considerable, and should be used to give an adequate train service rather than go to finance nationalised services.
....Mr J. M. Mitchell, county clerk, said the decision to close the line had been taken before the date of a meeting of the Scottish Transport Users' Consultative Committee, to whom these matters were referred. The question was on the agenda of this committee, and he thought it was a farcical position that the Railway Executive had refused to delay the decision until then.
....Mr M'Master said they had come to intimate the position to-day, and as far as they were concerned June 5 was the date on which the line would be closed.
RESOLUTION
....The meeting adopted a resolution strongly deprecating the proposal to close the North of Fife Railway. They are entirely opposed to any suggestion that the line be closed on .Tune 5 because of the effect upon the agricultural community, and of the opinion that the procedure in attempting to close the line has not been in accordance with democratic principles.
....Mr Mitchell said the resolution would be sent to the Fife M.P.s, Railway Executive, and, if it is thought wise, to the Prime Minister and the Minister of Transport.
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Were all communications from the Railway Executive through a solicitor? In The Dundee Courier, 14th June 1950 -
....Fife County Clerk (Mr J. M. Mitchell) has met with what he calls "door-slamming tactics" in his efforts to discuss with a British Transport Commission solicitor the proposed closing of the North of Fife branch railway line.
....A report on the correspondence between Mr Mitchell and the Railway Executive was read yesterday to Cupar District Council.
....In his final letter to the solicitor, Mr Mitchell had said: —" To deprive business people of transport facilities simply by putting up a notice does not accord with the elementarv principles of British justice, and, personally, I dislike door-slamming tactics when I politely ask for discussion.
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The Chief Administration Officer of the Railway Executive is mentioned twice in this article in The Dover Express, 7th July 1950, but not by name -
£80,000 TO KEEP E.K. RAILWAY OPEN
FINAL DECISION ON LINE EXPECTED SOON.
....The final decision on the proposal to close the East Kent Light Railway, which serves the villages from Shepherdswell to Wingham, is expected very soon.
....The Chief Administration Officer of the Railway Executive, in a letter to Mr. J. Arbuthnot, M.P., who took the matter up on behalf of Eastry Parish Council and the Ash Branch of the N.F.U., says that a large increase in traffic—considered unlikely—would be necessary to make the line remunerative.
...."Moreover, an estimated expenditure of £80,000 must shortly be incurred to bring the line even up to Light Railway standard if it is to be kept open,” the letter says. One reason for retaining the line put forward by Mr. Arbuthnot, was the probable expansion of the Kent coalfield, but to this the Railway Executive replied that the National Coal Board had no objection to the line being closed. Nor could the Executive obtain any information that a big house building programme was contemplated for the area served by the line.
....If the line was closed, the Chief Administrative Officer says, very considerable financial economies would result. Alternative facilities would be provided for dealing with the traffic. The question of charges for deliveries in the event of closure was still receiving careful consideration. It was appreciated that facilities at main line stations for dealing with sugar beet might not be quite so convenient for some farmers, and the extra cost to one coal merchant, was admitted. A reduction of the service to one train a day would not result in any appreciable saving, as the engines were primarily required for Tilmanstone Colliery working, and would not be available for use further afield.
....Mr. Arbuthnot. in sending the replies he had received to the Parish Council and N.F.U., has suggested that when the Railway Executive decision was known, they should call for a public inquiry before the line is finally closed.