I posted the same thing on NextDoor over the weekend. I need a bridesmaid dress altering for end March.

These came back:

sewnright.co.uk - Wandsworth
I Do Bridal Wear - Kingston
Sewing Room - Putney
Perfect Alterations - 98 Bedford Hill

Good luck!

Sewn Right in Earlsfield are amazing. They are based in the business centre behind flip out

Chambers in Wimbledon village are brilliant. They transformed my wedding dress completely to my exact vision. I also use them regularly for tailoring my clothes for the perfect fit.

Looking for recommendations on Seamstress/tailor/dressmaker to do alterations on wedding dress for the end of March