Not wishing to start a 'which is better' spat, but having spent several years cycling in both London and Paris, I don't think Paris is any 'worse' than London, I actually find Paris less stressful and with better cycle lanes than London. A couple of years in Sydney too, including commuting Bondi to Botany Bay by bike for a while. Agree for the weather, hot hot sun, and lots of hills. You might as well wear a helmet, during the day at least, just to keep the sun off your head. Keep hydrated.
Not wishing to start a 'which is better' spat, but having spent several years cycling in both London and Paris, I don't think Paris is any 'worse' than London, I actually find Paris less stressful and with better cycle lanes than London. A couple of years in Sydney too, including commuting Bondi to Botany Bay by bike for a while. Agree for the weather, hot hot sun, and lots of hills. You might as well wear a helmet, during the day at least, just to keep the sun off your head. Keep hydrated.