What is a good reason for a return trip UK to Europe to get 6 month visit visa waiver stamped in my passport?

mestressedout asked: UK Immigration did not stamp a 6 month visitors visa in my passport when I arrived from America 3 weeks ago as I passed through Dublin on the last leg of the flight and they don’t stamp Visas on flights from Ireland.

I spoke with them this week and they said that they can’t [...]