If you walk down Brick Lane, past the old brewery, past Brick Lane Coffee House and to Bethnal Green Road, cross .. and continue down Brick Lane (With the cool building with 3 2 1 down the front of it on the corner) you will find about 50 metres down on the right (Past the basketball court), "Molly Sugden Hairdressing".
It's always been closed whenever I go past, so no idea if they do blue rinse, but according to a review on the internet, inside it's a luxurious yet funky looking salon with sparkly chandeliers, deep purple walls and a beautiful damask grey wallpaper ...
Apparently the owners did invite Mrs.S to the salon, but she never made it but did wish them all the best.
Shot on the iPhone5, with Awesome Camera (And it is ..) and processed with Snapseed, Camera + and Perfectly Clear.