Living as I do, a rather convenient 209km from the start, I had been planning to ride the 200 as the middle section of a DIY 600.
But speaking to Mike Wigley yesterday (an unlikely entrant on the Stevenage 200 - riding in Jeans!) who is a controller on the 300 - these rides sound a bit fierce for me, when embedded in a 600 like that; after all, I've only ever ridden one 600 before.
I might be tempted by the 200 on its own though.