I couldn't agree more about the terrible decision to keep Sutton loop trains using Thameslink core. It's an established fact that loops (as opposed to termini) are bad for reliability, hence the conversion of the Circle line to the 'tea cup". The Sutton loop also has a single track section through Wimbledon station, which can only worsen reliability. Finally, the Sutton loop is restricted to 8-coach trains, reducing capacity through the core, and also on the Thameslink slow services north of the river which are in desperate need of additional peak hour capacity.

The campaign and decision to keep Sutton loop trains using the Thameslink core took place without people north of the river knowing that there was a chance of such a decision, so there was no opportunity for a counter-campaign.