In reply to leeoftroy:
The Ramblers group would be the go-to organisation for ramblers and they have some volunteers that may organise walking events.
Several groups on Meet-up: https://www.meetup.com/topics/walkers/gb/45/bradford/
Dales Walking Buddies on Facebook
There's a group of all ages but mostly seniors (I believe) called the Wednesday Wanderers that do train trips out to the dales and (used to / may still) hire a bus as a group: email wednesdaywanderers@outlook.com
I might offer my services but am pretty much dedicated to full weekends further afield in run up to my ML.