I am trying to sign up for Imperial Winter Series at Hillingdon .. there is a £5 membership charge at RiderHQ; I have never used RiderHQ before I always thought it was free to use as a rider ..
It's likely to be a deposit for the timing chip you'll get for the series.
The London Cyclocross League are using RiderHQ for the first time this year and have levied a similar charge. We should, although I'm not sure how the logistics will work, get it back at the end of the season.
I am trying to sign up for Imperial Winter Series at Hillingdon .. there is a £5 membership charge at RiderHQ; I have never used RiderHQ before I always thought it was free to use as a rider ..