The Willy Warmer isn't bad for a first 200k on fixed. It starts off with a bit of a climb and you do have to contend with the Boxford Alps which can be a bit sharp and punchy but the climbing is pretty much all front loaded. If you've done a few 200ks already then I reckon it's good one to have a go at as long as it isn't icy on the day.
jsabine - If you think you can manage a 200k audax then January isn't a bad time to get started on it. You're guaranteed that the next time should be a whole lot easier. I've done the Poor Student as a solo ride in January and it was pretty good. Mind out at the bottom of dips though. The Cotswolds can harbour some cold traps and you may occasionally find icy patches even though the weather seems warm enough to melt it elsewhere. This took out a couple of people on the Winter Solstice ride in similar locations in Cheshire. The only other thing I would strongly recommend for winter audaxing is some road atlas pages, especially if you don't have a GPS. Iced up roads, flooding and other things can all lead to unexpected diversions. Guessing your way out of country lanes is never fun.
The Willy Warmer isn't bad for a first 200k on fixed. It starts off with a bit of a climb and you do have to contend with the Boxford Alps which can be a bit sharp and punchy but the climbing is pretty much all front loaded. If you've done a few 200ks already then I reckon it's good one to have a go at as long as it isn't icy on the day.
jsabine - If you think you can manage a 200k audax then January isn't a bad time to get started on it. You're guaranteed that the next time should be a whole lot easier. I've done the Poor Student as a solo ride in January and it was pretty good. Mind out at the bottom of dips though. The Cotswolds can harbour some cold traps and you may occasionally find icy patches even though the weather seems warm enough to melt it elsewhere. This took out a couple of people on the Winter Solstice ride in similar locations in Cheshire. The only other thing I would strongly recommend for winter audaxing is some road atlas pages, especially if you don't have a GPS. Iced up roads, flooding and other things can all lead to unexpected diversions. Guessing your way out of country lanes is never fun.