As I was getting my station set up I found it really helpful to be able to calibrate against other nearby weather stations in and around Eastbourne. So, for my own convenience, and in the hopes that it may be useful for others too, here is my list of other Eastbourne weather stations. It is probably not exhaustive, but it is what I was able to find on WeatherUnderground and the WOW section of the MetOffice website. Thanks to those who run them!
Met Office page: 5583584
Weather Underground page: IENGLAND290
Met Office page: 207977
Weather Underground page: IEASTSUS29
Met Office page: 229364
Weather Underground page: IEASTSUS40