Why boycott? I went in there yesterday for an air freshener and a pair of wiper blades, plus a can of Gunk Green degreaser. Refusing to shop there even if it's inconvenient to go elsewhere is cutting your nose of to spite your face. . I buy my GT85 there as it's cheaper than the LBS, (and try pricking my conscience over 3 for 4.99 or one for £5.00!,) and if they have the old 3 for 2 I'll treat myself to a handful of inner tubes. They sell gear cables on a sunday if mine need changing etc etc etc. My Boardman bike was well put together and well set up, although I have never taken it back there, trusting myself to do the servicing.
At the end of the day it's a shop FFS, so frothing at the mouth and calling for nationwide boycotts for fear of not pandering to the elitist "I wouldn't be seen dead in Halfords" brigade is just ridiculous.
Shop there, buy bikes and accessories there, hold your head up high. Don't recommend them as a source of advice to novice cyclists, but how are you going to stop the "it was only 100 quid and had full suspension and everything" brigade going in there in the first place?