I spent the first 19 years of my life in Shropshire and never heard of this. But yeah, if you want to do it for charity, I'm sure people would still sponsor you. It's still a challenge, even if you have done it before. Plenty of people do the Bridgnorth Walk (the big thing round where I used to live, oh yeahhh) every year and make lots of money.
who are introverts?