The Greenway around Letchworth is like the M25 on a busy Friday afternoon. Best avoided unless before 8am or after 6pm. Don't blame the cyclists, pedestrians and bog walkers as its a convenient place to get some fresh air. Makes sense to use an indoor trainer if you have one and if you don't I think its reasonable to solo cycle locally. I can't define local, ask Boris. My indoor trainer is being put to good use, not just for cycle specific fitness but also my mental arithmetic (poor) skills are being tested. Apart from watching metrics such as time, heart rate, power etc, the boredom occasionally compells me to work out fractions, percentages of a ride