None, I'm afraid.
His LinkedIn account mentioned "Ashapura Caterers" but Google on that company name yielded no results:
Have you tried Chennai Dosa? It's another vegetarian spot which I'm told was quite good.
BTW, if you're interested, our resident "Indian-food-in-London" expert, JFores, is organizing another Chowdown - this time at Thattukada, a Keralan spot in East Ham, tomorrow evening. Do email me at email@example.com if you're interested to join in.
Have you been to both the East Ham and the Tooting branch?
I went to the East Ham branch and wasn't that impressed.
Admitidly I had the kottu rather than dosa (I was on a bit of a kottu thing having just got back from Sri Lanka).
I know they have a branch in Wembley but if I'm up that way I normally head to Saravanaa Bhavan.