Reasons to go on an Interrail around Great Britain

A train station that you could see if you go on an Interrail around Great Britain

The other day, after rereading the article on "How to save on train tickets in the UK", I thought about why people don't usually come do an Interrail around Britain. I know many people who have done the Interrail around several European countries, but Britain isn't a common destination: at