Good clue
I have no idea...
I'm willing to back down on this if others disagree but for me that has to be a penalty. There may only be two stations with Bristol in their name but there are plenty of others in the city! Not to mention that strictly speaking it is in South Gloucestershire...
EDIT: Actually, it has to be a penalty. If it is referring to Bristol, it is smaller than Temple Meads; if not, it is larger than Patchway.
This has made me think of a potential problem though. What happens if a clue is a dud? Should the setter lose a point? EDIT: Have updated the rules; the penalty is three points and a forfeit of the player's next floor.