Clothing/Shoes/Weather Gear: I'd like to point out that girls in Southend don't all dress like the above. Most of us are well dressed due to the latest trends leaking from nearby London. There are orange, stiletto wearing girls like there is anywhere else in the country. You'll find most of them pretty glammed up due to TOWIE.
Bring shorts and t-shirts in the summer, but make sure you have a spare pair of jeans and an extra top layer as the weather can turn and it can be pretty windy on the seafront!
Toiletries and Medical Supplies: Plenty of suncream for those sunny days
Your nicest make up as Southend's girls were recently voted the prettiest in the UK so you will want to fit in ;)
Photo Equipment: A standard digital camera can take some beautiful snaps of the Thames estuary and beach.