The owners of the shelter near the Oval welcome visitors, including school parties, and may be contacted via Martin Stanley. It has also been featured in a number of TV programs, including an episode of Blitz Cities hosted by Shane Richie (who played Alfie Moon in EastEnders). Here he is with his interviewee Joan Longley who recounted her experience of using a wartime Anderson Shelter.
Other visitors have included several school parties.
One visiting school - Willow Brook from Leyton in North London - kindly showed me these extracts from the school's 1939 to 1945 Chronicle and Record Book.
Other visitors have included an "evacuee" and a first class model maker: