British Overseas Territories stamp collection (Gibraltar and Bermuda)
A friend already asked did I ask Borders and Coastguard to stamp next to Bermuda stamp. No but it looks so cool nonetheless, I won’t begrudge Madam for stamping upside down.
Only three non-UK/EU passport holders on my flight. And I got my money’s (miles) worth on the triple landing too https://www.flyertalk.com/forum/british-airways-executive-club/1504522-ba-lhr-gib-side.html#post35767789
No Gibraltar stamping when crossing land border. Only Spain stamped (I walked over the Frontier to La Linea side for my car, then drove back for some plane spotting at GIB).