I've recently bought 2 part worm tyres on ebay. Thought it was quite a good deal, two 225 40 18's for £110. With 6mm tread.
Firstly they took 11 days to arrive, in this time I had my mot which had to be put back until I had the tyres. They came in the day of the retest which I thought was lucky.

As you can see there's a nail in the tyre. The Ebayer sold them stating there had been no previous repairs, so he sold them knowing there had been.
So basically I'd like to warn everyone not to use Platinum Part Worn Tyres UK. wayne kerrS!