Our booking engine at tickets.railforums.co.uk (powered by TrainSplit) helps support the running of the forum with every ticket purchase! Find out more and ask any questions/give us feedback in this thread!
The 3tph between Truro and St Austell point is a headline stat as it mentions two big populations. It goes without saying that Par will also have the same frequency (give or take a couple throughout the day).
In terms of the new loop on the Newquay branch, this will be used by the metro trains...