This was posted by me back in April 2015 !!
yes the taxiways meet the minimum measurement requirements as laid down in CAP168 however ............................ they are well below the required PCN and have been for some time. Taxiway Alpha has a PCN of 47 (published correctly in the AIP) However the published figures of "B" and "C" are 26 well they are more like 15 at the moment. An A319/A320 dependeing on surface require at least 39 (if my memory serves me right)
This can be tolerated but only on a very infrequent basis.
These taxiways when they are used frequently cause a large amount of FOD/stones to be prevalent on the surface causing an ingestion hazard.
Taxiway Bravo and the diverted centreline was purely a temporary measure to prolong the life of it ( A good decision at the time) . However because of the AIP entry it now seems more permanent.
However this taxiway situation also cuts down the flexibility of any operation or situation. If "Alpha" ever had a problem (disabled aircraft or concrete failure) they would be up the proverbial creek without a paddle.