I don't know if anyone is planning to go and watch the Veteran Car Run this year. If so, note that this year they have changed the route to avoid Thornton Heath and Croydon because of road works and going via Sutton(-ish). In more detail, their website says:
The usual route from Hyde Park to via Westminster Bridge and Kennington then:
Kennington A 23
Stockwell A3
Clapham Common A24
Colliers Wood A24
Rose Hill A297-A217
Banstead A217
Burgh Heath A217
Reigate A217-A25
then back to normal A23 through Earlswood, Salford and Horley and A2219 to Crawley (half way) and on to Brighton