Request...

PING Pete - worked it out on thetrainline.com - should cost £38 and take 3.5 hours if you're quick on your feet around London (i.e. making sure you're at the front of the train coming into Euston, getting a tube ticket super-quick, and getting a ticket at Victoria super-quick).

dep Liverpool Lime St 0915, arr London Euston 1147 - £24 on Virgin Trains - need to book before 1800 previous day.

Tubes every 3 minutes direct to Victoria (Victoria Line) - £3 single, takes

dep London Victoria 1203 (or 1211/1233), arr Chatham 1246 (or 1310/1316), £11 single - standard fare.

HTH.

Though I must have powers that thetrainline.com doesn't, as just typing in Liverpool to Chatham makes the cheapest fare 64 quid or so. Even though as long as you get the £24 fare available on the 0915 train, all the other fares aren't time-critical.

Whats wrong with lymm?

Not a lot, from what I've heard - sounds like a nice place to live. Why do you ask?