Look around the NSPL teams list for Nottingham based teams.
In my opinion you're more likely to find teams in the masters who come from the surrounding areas, rather than in the NSPL, but you're welcome to look obviously.
(like leicester wildcats who're always recruiting)
Like Dark said if there was enough people in your local area who wanted to play they would have contacted you by now, so it's probably better to travel a little bit (down to leicester is probably cheap by train), and train with an established team.
OR, you could ask if you could place adverts at nottingham skirmish, but it's less likely you'll find tourney players there, it being a wood site obviously.
Cheers
Rosie