Black to blonde... where can i get it done? any good hair salons in london?

ive been dying my hair black for about 8 months now and just want to change it, i want like a paltinim blonde. i knoww it wont be easy, and will go orange before blonde but i am prepared for that, i just wanted to know if anyone has done this profesionally and where they went to get it done.Black to blonde... where can i get it done? any good hair salons in london?
i think lemontree



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