about 60 miles
42 miles
Brighton, East Sussex, England - 22 square miles
About 70 miles.
28 miles
About 60 miles.
Depends, of course, where in East Sussex. From Eastbourne to the outskirts of London (Croydon, for example), you can drive it comfortably in one hour 20. Using the train, the journey takes around one hour 30 to London Victoria (which is reasonably central).
If you are refering to Crawley, Sussex, you are way off. Although it is not a part of London, it was built for a settlement to ease congestion in London, I believe. It is many miles North of Brighton, South of Horley in Surrey, North-east of Horsham. It is also just south of London Gatwick Airport, on the Surrey-West Sussex Border but on the Sussex Side. I hope my answer has helped you slightly. Good Luck.
East Grinstead to Central London is about 35 miles.
about 410 miles
my answer is 150
42,000
About 80