I fully agree with George! Yes, their age, but I have seen both of them in real life (Peter in particular as most of you know) and they are far from just sitting down. Peter could go down on his knees if you asked him to kneel down, he doesn´t even need help getting up from a chair or climbing into a car or so (of course you do help, but he could also do it without that). It´s sad the last few series give the impression they can hardly walk. Apart from that, I generally can´t agree when people say the show kept getting better and better during its later years, in my opinion it´s the opposite and I found the first few the best ones, until Brian Wilde left for the first time. The lines and characters changed slowly over the years and became more predictable, if you ask me. Especially Clegg, or at least he is the one I noticed it the most in. His sharp witty comments of the very early years got lost pretty quickly and he became more and more cowardly and soft which I never noticed in the first few series, but is very obvious for the last 10 or 15 years.