It was excellent last year. I shall be going. Size is fairly large. Main gym sized hall and side rooms. Lots of parts and a wide range of traders.
I didn’t buy anything in the end as I went with a shopping list and a promise I wouldn’t come back with anything large but I had my eye on some tek and HP bits. This year all bets are off
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Advice though: was frozen solid waiting last year and the queue gets pretty big pretty quickly. Get there early and take coffee