My wife is a US citizen. She was given a 180-day private medical visa to the UK finishing on 24th August. She left the UK on 16th July after using 97 days of the visa. She wishes to reenter the UK on 23rd August making use of the 180-day visa-free entry scheme for US citizens, and leave on 26th August.
Is this possible? Will the private medical visa be cancelled and my wife allowed to enter under the 180-day visa-free scheme? (This would be fine.) Or, will she be obliged to enter on the private medical visa? (The treatment has been completed.) Additionally, will the fact that she has been entitled to be in the UK for 180 days on the private medical visa remove her right to visa-free entry?