I believe the 30 days definition for a calendar month will also apply when you calculate the number of days you have been away from the UK, that is, the months you have been away are equal to 30 days each even if some of them are 31 days long. The interpretation cannot apply to one side but not the ...

I believe the 30 days definition for a calendar month will also apply when you calculate the number of days you have been away from the UK. The interpretation must be applied across the board