AtlanticXpat, so the base cost for the upgrade is £60 and then there's another £15 for fees/taxes? For a total of £75? Or £60 + £75 for a total of £135? (If the latter, then, YIKES, I understand your reluctance. Fees that cost more than the service drive me crazy.)
We'll be flying that route in June, so I am curious. Though we fly IN to LGW and BACK from DUB, so the taxes coming home from Ireland may not be as awful as from the UK.