20 million passengers passed through the UK's airports in May!!
Yes, although the method of recording data means there is a huge multiplier effect of intra-UK airport passengers. A passenger routing, say, LBA-LHR-LAX-LHR-LBA would appear 6 times in the UK data.
1 departure ex-LBA to LHR
1 arrival at LHR from LBA
1 departure ex-LHR to LAX
1 arrival at LHR from LAX
1 departure ex-LHR to LBA
1 arrival at LBA from LHR.
A passenger making just a routine round-trip between LBA-LHR would still appear 4 times in the count.
682