Gosh I'm impressed some of you have done so well.
I got 12 and my DS, who I sent the link to , got 19 . We've now combined our answers and got a couple more and we are on 23.
Considering he is a railway enthusiast, good at geography and works in transport planning my DS is extremely miffed that he isn't doing better!
In mitigation it does seem quite England orientated and we are in Scotland. That's our excuse anyway!
Keeping trying with grim determination