Originally Posted by Christopher

For example, holders of a Certificate of Entitlement to the Right of Abode in the UK are definitely entitled to use the UK/EU/EEA queue at ports of entry, but this information never appears at those ports of entry, and there are anecdotal reports of such people sometimes being required to use the non-UK queue at one or two smaller British airports. (It makes complete sense that these people should use the same entry queue as British citizens, since they have exactly the same entry rights as British citizens and are not subject to any form of immigration control.)