Bannatyne's Health Club

The thing about Bannatyne's is that it's a proper full-service health club rather than a casual drop-in gym. Located in Greater London, it's the kind of place where you'll find everything from swimming pools and fitness studios to spa facilities and treatment rooms all under one roof. The swimming pool is the real draw - several lanes, decent depth, proper temperature control. Beyond that, there are free weights, cardio equipment, group fitness classes throughout the day, and a spa area with sauna and steam rooms if you're after some post-workout relaxation.

It works best for families taking a glamping break at nearby Abbey Wood Experience Freedom (about five miles away) who want a proper workout session or a swim. Fitness enthusiasts will appreciate the range of equipment and classes, though it's not a specialist lifting facility - more generalist. Parents with young kids might find the family-friendly swimming times useful, though you'd want to check the current schedule.

You'll need a membership or a day pass to use it, which isn't free, so factor that into your budget. Allow a couple of hours minimum if you're combining swimming with other activities. Midweek mornings tend to be quieter than evenings and weekends, which matters if you prefer less crowded lanes. It's convenient enough if you're staying in the Greater London area and want to maintain fitness during your break rather than something you'd specifically travel for as a holiday destination in itself.