OK, well just to update all of you good people. I took a week off the bike and could only manage 1 ride this week due to the kids being off on holiday. The ride was much better after the rest, legs felt good and easy to get my heart rate into the 150's. Before it was sitting at about 130-140 and things got really painful if I tried to push for a higher rate.
So, after reading your advice, which has reinforced my belief that I was overdoing things, I will concentrate on diet and breaks. Now, can any of you guys recommend a good book or site that I could use to adjust my diet. I've got a busy home life, little time to cook or prepare stuff and all my miles are done commuting. I don't get the time to go out on the bike for pleasure, well, hardly ever.
What I really need is "The 200-km-a-week commuter's guide to breakfast, snacks, lunch and dinner".
Basically, at the moment, I have two white slices of buttered toast and a cup of tea before leaving for work.
Lunch is usually soup and an apple (chicken & sweetcorn with a bread roll on cycling days)
Vegetable soup and an apple (on motorbike days)
Dinner could be anything, might be spaghetti bolognese, shepherd's pie, chicken curry, sometimes we have fish.
Any advice, as usual, will be greatly appreciated.