Your comments to other answers answer suggest that you actually meant to ask 'What towns outside London are within an hour's commuting time by rail of the Royal National Orthopedic Hospital near Stanmore ?'
Is that right?
If the main constraints are:
- the RNOH is not within convenient walking distance of any railway station.
- it's nearest station, Stanmore, is the terminus of an Underground line going into London, so of little use for commuting outwards.
- it's next nearest station is Elstree and Borehamwood, which is about a 15min journey away by bus 107.
From there, trains to Radlett, St Albans, Harpenden, Luton and Harlington allow a overal 1hr journey (bus and rail), or the next stations, Flintwick or Ampthill, slightly longer.