I would advice caution on relying on the pro-rata for the GCB if you have not completed a full 3 year term, I would want Motability to confirm its on the GCB and not in fact on the original AP, in their own statements they make it it very vague, I would want it in email confirmation from them before relying on what could be the word of a newly trained call handler that may have got things muddled.