Hello all
I have met or talked to several of the names listed here.
Confort at the oldschoolclub was a very nice lady who showed me a very nice dress she made. I would recommend her for alterations. Inma (who is not a seamstress but made the introductions) was so warm and helpful, thank you again very much.
The best person for me in the end turned out to be someone recommended by a mum from the school.
Her name is Elaine Closs and she is on Battersea Rise (but will soon move to her studio in Fulham and offering instead onsite visit in your home or office).
http://www.elainecloss.co.uk/
She was honest, experienced, friendly, empathic, imaginative and creative and offered reasonable prices. She really tried to find alternative solutions for my dress. Highly recommended.
She also confirmed that my dress was badly made, which is what I suspected! I have now two options: trying to make do with that one (with Elaine's help) or buying something new.
This time I probably won't go for a weddingy dress but just for a nice dressy outfit straight from the shops well cut, well fitted and that make me look stylish. So if you have any ideas of shops or brands that could help me in that quest, do let me know !