As long as you turn up for work properly rested in accordance with CAP371 and are able to turn up to work within 1:30 when on standby where you choose to spend your time on your days off is your business.
CAP 371 does state "Travelling time, from home to departure aerodrome, if long distances are involved, is a factor influencing any subsequent onset of fatigue. If the journey time from home to normal departure airfield is usually in excess of 1½ hours, crew members should consider making arrangements for temporary accommodation nearer to base."