All the leaves on my 3 tumbler tomatoes have turned completely yellow, but
the leaves have not dropped off, nor have they shrivelled, nor have they
dried up. The leaves have turned bright yellow, no mottling, but some of
the leaves do have a few brown spots.

Today I stripped off all the leaves completely as I figured they weren't of
any use and if it's a disease it might spread.

The 3 plants are in one hanging basket but the basket has not been hung up;
it's been kept on a greenhouse bench. The soil has been kept constantly
moist (possibly too moist?). None of my other tomato varieties are like
this.

I've put up a scanned image of one of the leaves, if anyone would care to
look and let me know what the problem could be.

I did overdo the fertiliser once, so could it be fertiliser burn? When the
plants first started to yellow I sprayed them with epsom salts.

Also, there are several small green tomatoes still on the plants so if these
tomatoes ripen will they still be edible?

The image is at http://homepage.ntlworld.com/melanie.mccluskey/

Many thanks.