Does it have a park and Ride system?

Yes.

It has 2, if not three, which I'd thoroughly recommend if you're not local. From which direction are you coming?

Last time I went to Bath it was early summer and a weekend and there was loads of parking off Charlotte St. OK so traffic was heavy heading in to town but the buses were stuck in the same queue. There is plenty of P&R too though – http://www.bathnes.gov.uk/BathNES/transportandstreets/parking/parkandride/default.htm

Cheltenham

i know of a cheeky free car parking space slap bang in the centre,
but I'm keeping that secret 😀

if you can, go to the guild hall with some headed paper(made up) and ask for a contractors permit which costs a quid per vehicle then find a closeby residential street, of which there are plenty near the centre and park there for the princely sum of two whole pounds for all day.
bargain-ous.

Landsdown Park and Ride is your friend Rocketdog. About five minutes from A420/A46 roundabout (if coming from motorway, turn right and follow signs). Not going for the rugby are you?

We always use the Lansdown one too. A46 from the motorway junction, turn right at the Toll Gate cafe, right / left at staggered X-roads at end, then follow nose to the P&R on top of the hill just past the RaceCourse.

By train you end up so close to the city center, no need to take the car. I bet there is a direct service Cheltenham – Bath

Cheers everyone

thanks for the info, lansdowne proved difficult to get to as "frozenhill lane" was frozen (i should have known)so parked at new bridge, had a great day