As we are travelling from Inverness I don't anticipate that being much of a problem
To be honest I envisage an elevated level of service somewhat similar to Club Class on a plane with one steward to service a handful of passengers in the new elite K Carriage well away from the hordes.
Added to that I am anticipating the Lounge at Euston will be a lot quieter as well.
As it is a Sunday I am looking forward to a spiritual experience
If my vision materialises the extra cash expended over SP will be a worthwhile investment.