This set of the BBC original and the cinema release is well worth getting. The excellent and informative commentary on the TV original has the TV producer plus Phil Daniels and David Threlfall (the original Archer, tied into an RSC contract during the time of the remake). All the ins and outs of the TV ban are dealt with both during the commentary and in a separate interview with the producer, but of especial note among the extra is the interview with Roy Minton who is remarkably frank about Clarke's attempts to rewrite the script without Minton's involvement for the film - it ended their close relationship - and about his own subsequent falling out of favour with TV bosses.
I had only seen clips of the cinema film before viewing these two versions together so I'm not particularly wedded to it. The TV one does seem better: David Threlfall's take on Archer as deceptively gentle and disembodied means that the hard centre he reveals in the key scene with the warden obliged to supervise him is far more effective. Indeed, had Roy Minton been allowed, as he wished, to buy the original from the BBC at cost (once the rights had reverted to him following non-transmission) there would have been little point in making the film: the picture quality is fine (all film, not video) and could have been screened.