My husband and I (United States citizens) are currently in Scotland. We landed in Dublin on 16 August 2019. When we went through immigration we told the guy that we were visiting Ireland for 3 weeks and then flying to Liverpool to spend 3 months in the UK. He told us that the Ireland Visa only allows for 3 months of traveling in Ireland and UK.
We flew from Dublin to Liverpool and weren't sent through immigration to get a UK visa like we had hoped.
If we flew to the UK first, we would have a 6 month Visa, but because we landed in Ireland we now only have a 3 month one. The agent did tell us that if we traveled to mainland Europe and back to the UK that we would then get a 6 month visa stamp from the UK, but we really don't want to do that.
Does anyone have any experience with this? Will the UK agent consider us overstaying our Visa when we try to fly out of London on 17 December, 4 months after landing in Dublin, or will they not care since their Visa length of stay is 6 months?