I came across Flamme Rouge while having a browse about:
It’s a Jersey-based website which offers a lot of very useful information on everything from training to cyclosportives and racing. It’s rather well and clearly written and covers most aspects of cycling.
Most useful is the factsheet section which offers guides to training, fitness, performance and so on. I was particularly interested by the cyclosportives section as it contains an excellent overview of the Tour of Flanders event.