Pointless topic.
If Poole want to replace Smart it will have to be from the original list of 23 riders. Lambert will not replace him, he was offered the opportunity to be part of the group of 30 riders but turned it down thus he shouldn't be allowed any rides as part of the system.
Holder also won't ride mainly because he would have to commit to riding for Team GB for 5 years which he isn't going to do.
What I expect to happen during the course of the season is for the list of 23 riders to expand to take account of injuries and loss of form, but it will do so for young GB riders who were not offered the opportunity at the start of the season (i.e. those riders that would have been ranked 30-40 on the original list).