Not a Lancia meet but the annual cars on the green event in Bury is going to have over a 1000 cars this year. I'll be there with the Alfa (one of 30...) but then it's literally yards from my house.
It's more a retro show than a classic show but there's always loads of interesting stuff.
And it's free too.
http://www.buryretrocarclub.co.uk/#!carsonthegreen/hzjea
Sunday 19th June - Fathers day