Which? magazine

“charge up to 63% extra for single first class tickets.”

“charging 30% extra for a single first class ticket on the high-speed route between St Pancras in north London and Dover Priory”

“charged passengers 63% more for single first class fares between Luton Airport Parkway station and Wimbledon in south-west London.”

“40-minute slower first class service”

“12-minute Tube ride to Vauxhall”