Anyone know how much more non members pay?
Also, what's different about the ones that say "flat fare"?
Finally, it only mentions one departure point. Do they cater for those who don't live in Brighton & Hove?
Yes. They pick up at Hickstead (by the Castle Inn) and also at Pease Pottage services on the M23. I think non members usually pay a few quid more, no more than a fiver or so extra I believe.