If we ran a training camp in Girona, Spain what would be the best month for you to attend? Only vote if you think you could reasonably make it over

I regularly get over to London for work and often have to suffer on a poorly ventilated Peloton bike to get my workouts in. Is there anywhere in central London I can rent a road bike for a few days to get some early morning laps around Regent's Park and the likes in? Curious if anyone here has experience with that.