While high speed trains are a nice idea they benefit so few people that the cost of it barely makes it worth it. Would of been better of spending the money connecting up towns, villages that don’t have access to trains, local rail basically, so places like Witney, Abingdon etc have a train that runs into Oxford for example.
HS1 benefits people who already live near the stations it runs from, they will just have a shorter time on the train, it won’t encourage a lot of new people to use them. Whereas improving the the network as a whole would make rail travel more realistic for millions for everyday journeys, not just the few who travel that specific route.