Checking what is allowed is spot on. Friend of mine had allotment for years and suddenly the council would not let her use old carpet strips to keep the weeds down.

Get a water butt (or 2) to collect rain water. Drought conditions in south east a couple of years ago had my friend constantly lugging jugs of water to her allotment.

Make friends with the neighbors is good advice too. Start by admitting you are a novice and hope to get some advice from the experienced denizens. People like to talk about what they love. These new friends may be around more and help to protect your patch from pest both human and insect.

Good luck and let us keep us informed of your progress.