Have you done any Gliding in the UK?
You have a SPL so are already one step ahead of your regular PPL guy.
Find your closest UK club, but don't expect just to jump into the tug straight away unless they're desperate, you may find they're already trying to train up longstanding members as it is with this deadline, some clubs have waiting lists for tug pilots. Gliding as you know is a volunteer sport after all, nothing happens at lightning speed.
If you don't mind living on little to build up your hours further you might have more success getting trained up if you apply to one of the vacancies that is bound to open up at some clubs for summer tug pilots for 2018, do bear in mind you're not paid to fly, but you might get free food, accommodation and transport!
Planesandthings