Reform would have to perform a miracle to be in with any chance of winning any parliamentary seat in Croydon. Sarah Jones and Chris Philp, despite being opposite parties have longstanding support in their constituencies. Croydon East is the new constituency from old Croydon Central and again it would need a miracle.
As for Mayor, I've met Jason Perry and found him intelligent and focused on the job. Its a two horse race between him and whoever the Tories would put up.
The big issue for any council is to sort out central croydon which needs massive public / private investment