Slo, check out Tamar trotters site, they have most up to date races in Devon/Cornwall area, it's a shame about tavy 7, gutted!! Would have thought with the reasons for cancellation they may have changed the date, but it's not that straight forward I know.
Got Cornish marathon in nov, same day as drogo, bicton blister the wk after is worth a look! 4.5m or 11m races.
