I said that if it worked, I would give it a massive plug. So here it is. Wizz Oxi Ultra Plus Fabric Stain Remover is a miracle product!
Remember the teatowel? Just to remind you, this is what it looked like:
And now it looks like this:
Now, I have no idea how safe or chemically nasty this stuff is. But Friend Claire the Chemist didn't seem too alarmed (though she works on a daily basis with hydrochloric acid, so perhaps she is immune to chemical alarm). And I can witness that even while it was doing its work on the bramble juice stain, it was giving off no visible or olfactory fumes. But then, it does have a big cross on the back of the tub with the word HARMFUL in caps underneath. I guess it is to be treated with the same respect as bleach.
Whatever. It worked! And a quick google tells me it can be picked up in Poundland for - wait for it - £1. Cheaper than a new teatowel. :)