I have a garmin nuvi sat nav and im living in the uk are there any free map updat sites i can use?

When you buy a Garmin you get one free update. and that is only available for a limited time. I paid 50 dollars for a one time update not long ago with my Nuvi. I think its 80 dollars for a lifetime update, I should have just done that, but I don't know how they would keep track of that, so, I just did the one time deal. I highly doubt you will find it for free, Its a complicated process updating. I mean, it's easy to do, it walks you through it, but it takes quite a while to update. Not sure you could ever trust a site that would offer that for free, I would think it a scam and probably just trying to steal your pc information