I'm just an onlooker with no axe to grind either way, but even our Labour-run borough has a 'persona non grata' policy for outsiders who'd like to use our facilities. I suppose, rather than charge outsiders to use their adventure playground, Wandsworth could make similar stipulations to those used by Lewisham, in which case their £2.50 charge could be seen to be quite reasonable (and inclusive) - especially as it doesn't exclude kids who haven't got their passport and electricity bill on them!

LEWISHAM's STIPULATIONS FOR PEOPLE USING ONE OF THEIR FACILITIES:-

ID and proof of address
We need proof that you live in the borough, so please bring original documents proving your ID AND your address.

Proof of ID and address:
•driving licence
•Lewisham resident parking permit
•blue badge parking permit

Proof of address:
•gas, electricity or telephone bill, no more than four months old
•water bill, no more than 12 months old
•bank/credit card/ building society statement, no more than four months old
•current council rent book or council tenancy agreement
•council tax bill, less than 12 months old
•residents' yearly parking permit
•TV licence reminder or vehicle licence reminder, no more than 12 months old
•housing association tenancy agreement or housing association rent book.

Proof of identity:
•credit/debit card
•work ID
•gym membership with photo
•medical card
•national insurance card
•passport.