There are good chains...there are certainly bad chains.

In order of the best and worst chains, with a minimum of 2 establishments in the chain visited:

Blacklock - 8.66 (4 visits)
Dan Doherty - 7.88 (2 visits)
Open House London - 7.8 (2 visits)
Taverns East Ltd - 7.7 (2 visits)
Noble Inns Ltd - 7.57 (3 visits)
Wright Brothers Ltd - 7.54 (2 visits)
The City Pub Group PLC - 7.43 (4 visits)
Indapubs - 7.42 (4 visits)
Metropolitan Pub Company - 7.36 (11 visits)
Cubitt House - 7.25 (4 visits)
Three Cheers Pub Co - 7.18 (3 visits)
Fuller's - 7.15 (16 visits)
Greene King - 7.1 (2 visits)
Urban Pubs & Bars Ltd - 7.08 (4 visits)
Brunning & Price - 7.08 (2 visits)
The Culpeper Family - 7.07 (2 visits)
The Columbo Group - 7.04 (2 visits)
Electric Star Pubs - 6.89 (2 visits)
Young & Co.’s Brewery - 6.82 (35 visits)
Gordon Ramsay Restaurants - 6.76 (2 visits)
Market Taverns Ltd - 6.73 (3 visits)
Mitchells & Butlers - 6.31 (5 visits)
Stonegate Group - 6.15 (4 visits)
- 6.12 (2 visits)
East London Pub Co - 5.01 (2 visits)
Antic Pubs - 4.58 (3 visits)