Thanks, Tom.
It's as I suspected. In Charlotte's case, confusing representations were made to her after she left the scheme about her retained entitlements in the scheme. As a result of the confusion she then made decisions in relation to her then current employment with (obviously) a different employer which, she argued, she would not have made if she had not been confused about her retained entitlement. The decision she made didn't affect here entitlements under her former pension scheme; she got what she was entitled to from that scheme and there was no decision she could have made that would have resulted in her getting more from that scheme.
This is different. Inaccurate representations were made to the OP while he was still a member of the scheme and, affected by those representations, he made decisions which adversely affected his entitlements under that scheme.