I’ve looked at the Q&A and can’t see anything that backs up what you have said. I.e. that the clubs insurance would be invalid if you let non-members ride with the club. I can’t see how warning them off makes any difference.
perhaps the answer is to ask BC themselves.
Please don't feel I'm trying to prove a point, far from it merely trying to answer the question and contribute to the thread. I feel the Q&A clearly states what and who is covered and therefore by allowing non-members to ride with the club there is a risk the insurance could be invalid. This would be especially so if a non-member or ex-member, other than an invitee as defined by BC, caused an incident which resulted in action against the club or an activity organiser. It is by exclusion that it becomes clear the ex-members you describe are not covered - a bit like car insurance where there is usually a statement of what is covered and therefore by exclusion every other eventuality is not covered. Every club I have known has a "five rides" rule and then one must join, this I feel is to comply with BC cover or lack of it.
Are individuals participating in club activities insured by the club’s insurance?
No. All individual participants are strongly advised to become a Race Gold, Race Silver or Ride member of British Cycling which provides the benefit of individual third party (public) liability insurance.
Contingent insurance cover is, however, provided to invitees who have been invited to participate in club activities with a genuine view to joining the club and are not already covered by any other insurance.
Who is covered?
1 The club against claims brought by non-members and invitees.
2 Officials of the club who act on the club's specific instructions during their term of office, against claims, as follows:
(a)
Actions brought by non-members who have been invited (prior to possible membership) to take part in the Club's activities, for example, club runs, social activities etc., for injuries sustained and damage to third party property, sustained during participation.
I should add as a club we have had to deal with this very issue. I sympathise as it is very difficult especially when a ride leader may simply being doing this to help out and the non paying member turns up. The ride leader can hardly be expected to know the guy has not paid, the consequences of this or to call him out. One instance we had the non-payer turned up on a brand new bike the same week he bounced a £15 cheque on us!!!! Following that he was given a written warning to stay away which he did for 18 months. He then rejoined, paid his subs and no one has ever mentioned the previous issue.