Peter
Try having a look on Gumtree (Dorset) saw a small trailer on there recently for £40, one on now for £60...
I live in Poole and have a 6' x 4' trailer which you'd be welcome to borrow from time to time, I still use it regularly myself for tip runs and DIY work and currently I really ought to make a new tailboard and bed for it from 18mm ply. However it might not be ideal for baiter, forstly its incredibly heavy duty for such a small trailer, which makes it a real pain to move around by hand, secondly there's no locking hitch etc so at baiter you'd really need a cable lock back onto the car for security.
Give me a shout if you want to borrow it though, will re-ply it sometime in the next few weeks regardless.
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