Bellini,I think the straightening treatment marg444 mentioned is available here.I recently admired someone's hair
which is at present long and straight and so shiny,I was amazed when she said it's actually curly.She has a treatment done at the hairdressers which lasts a couple of months.She gave me the number of the man who does it.
He is based in Westbourne ,which is not so far from you.Pm me if you would like his contact details.
Dec x