Our new ticketing site is now live! Using either this or the original site (both powered by TrainSplit) helps support the running of the forum with every ticket purchase! Find out more and ask any questions/give us feedback in this thread!
They often (in my experience) operate the services to Hayes and Orpington (shared with 465s). If you head to Cannon Street or London Bridge you should see plenty.
Nonetheless, the OP should see a few (certainly on Saturdays) if they go to London Bridge. At least one of the Cannon Street to Orpington Saturday diagrams and IIRC one of the Charing X to Sevenoaks diagrams is 376 operated on a Saturday.