“U clearly havent a Scooby Doo!”
Other than holding the L2 qualification and having worked leading mtb groups every week for a few years. No not a scooby.
“I therefore estimate leading a group ride at about 7 or 8 kms per hour”.
What size of group?
What age?
ability?
fitness?
Skill level?
How much experience do they have?
What time of year?
weather conditions?
What sort of terrain?
How far is the ride?
How much ascent?
Good luck with estimating every ride will be at 7-8mph avg.
OP. If you’re stressing about the ride assesment simply look at the area it’s to be held in for a rough idea of the terrain/hilliness. You’ll probably be in a group with 4 other MBL trainees max and one instructor/assessor. The riders in your group “should” be of reasonable fitness level and able to ride to a half decent level. Once you have your route adjust your estimate accordingly. It’s not the end of the world if your estimate’s a little out. so long as you sort out your late back procedure.
There’s intentinally not supposed to be any opportunity to do a recce for the newer UKMBLA assessment ride