The IanVisits guide to free and cheap lectures, trips, heritage events, organised tours and other random miscellany happening around London this weekend.

Top events in London on Saturday

During the weekend visitors will be able to tour the house, enjoy music and theatre productions in the gardens and take part in family-friendly activities.
10am to 5pm
 
Twickenham
Marble Hill Opening Weekend
The Rickmansworth Festival celebrates canals with at least 100 boats attending, the community and the environment.
10:30am to 10:30pm
 
Rickmansworth
Admission to Kempton Steam Museum. See an array of petrol engines and model steam engines from across the ages.
10:30am to 4pm
 
Feltham
Kempton Steam Museum open weekend
Annual open day at the cemetery with visits to the chapel and crypt – not usually open – guidance on family history.
11am to 5pm
 
Peckham
Nunhead Cemetery Open Day
Watch teams of watermen who will steer huge barges up the Thames from Greenwich to Westminster.
12:30pm to 4pm
 
Queens Diamond Jubilee Race
Acclaimed artist Brian Bolland will be signing Judge Dredd By Brian Bolland: Apex Edition at Forbidden Planet London
1pm to 2pm
 
Soho
Brian Bolland Signing Judge Dredd

Top events in London on Sunday

Weather permitting, there could be up to 50 hot air balloons drifting over Central London just after sunrise.
Starts at 6:30am
 
Lord Mayor’s Hot Air Balloon Regatta
During the weekend visitors will be able to tour the house, enjoy music and theatre productions in the gardens and take part in family-friendly activities.
10am to 5pm
 
Twickenham
Marble Hill Opening Weekend
The Rickmansworth Festival celebrates canals with at least 100 boats attending, the community and the environment.
10:30am to 5:30pm
 
Rickmansworth
Admission to Kempton Steam Museum. See an array of petrol engines and model steam engines from across the ages.
10:30am to 4pm
 
Feltham
Kempton Steam Museum open weekend
Visitors are able to explore both the Gardens and parts of the Mansion, including the Stables and cellars, at their leisure.
11am to 4pm
 
North Weald
Open Day at Copped Hall
Local community fete in Dulwich
12pm to 5pm
 
East Dulwich
Dulwich Festival Fair on Goose Green
This steeply, sloping garden comprises woodland walks, filled with flowering shrubs and ferns.
2pm to 6pm
 
Wimbledon
Visit a garden - Arthur Road, Wimbledon
Visit a series of seven floating barge gardens connected by walkways and bridges.
2pm to 5pm
 
Southwark
Visit a garden - Garden Barge Square at Tower Bridge Moorings
What impact has two decades’ worth of policing and counterterrorism had on the state of mind of Muslims in Britain?
3pm to 4:30pm
 
Holborn