Not strictly a Raspbetter Pi group, but the Devon (& Cornwall) Linux User Group will be able to give general Linux advice and at least 2 members have Raspberry Pi's.
Meetings in Paignton at the Shoreline Cafe on the afternoon of the 2nd Satuday in the month.
The Exeter LUG is a separate LUG in Devon, but again lots of Linux advice - Evening of the 2nd Friday each month in the Exwick Community centre.
There is also a meet Holsworthy too - check the DC LUG site for details.
I attend the Paignton & Exeter meets most months - can't make it in June due to another commitment though.