Milton Keynes recommendation for T5 2008 pop top problem

[AlisonL]

Can anyone recommend somewhere in the Milton Keynes area that we can ask to check our T5 pop top? We used it for the first time last month and one side drops a little overnight and it doesn't close on first attempt, but by using 'open' again it drops into place. We suspect that the hydraulic fluid and/or arms are starting to fail. From other posts it seems that VW van centres are not that great on pop tops.