The bspa allowed it to happen after both guests were going to ride for the other team in the second leg., so swapping round. The bspa have allowed Nick to replace Brady away even though his average is higher as allowing this swap of guests was a joke. You have to realise how bad the promoters here are at agreeing and setting rules.
And until something happens, like the majority boycotting these meetings and watching it on tv, these cock ups will continue with the level and checking of the rule makers of the bspa. If the promoters are hit in the pocket they might then make sure the sport is not run with mickey mouse rules.
Ford can tell any club anything but unless the rider has signed a contract of exclusivity with Poole the rider will decide where he will ride, he is self employed.
Until the new league formats and the management seeing if the bspa come up with a reduced team average limit again, rather than allow riders to improve their averages I would imagine the management have an idea of who they want in the team and will have one or a few team lineups in mind.