Thanks for the news about the working programme Ruth.

Don't forget your swimming costume! "Come on in, the water's lovely when you get used to it": the beach is pebbly except at Jacob's Ladder beach at low tide, so some beach shoes are useful too! There's also a nice indoor swimming pool in the town near the Box Office and main marquee at "The Ham".
If travelling transatlantic, think twice before bringing any expensive instruments, unless you're playing professionally and really must use your own (and then be well insured!). Might be cheaper to buy or borrow on arrival and then sell on/hand back when you leave!
Yes, and clothes, something to cover every eventuality that English alleged summer can throw at you!