Entry or Exit Stamping on UK passport

Hey All

Just a general query- has anyone ever been questioned on their date of arrival date and date of returned date in UK???

There won't be any UK immigration stamps in a UK passport.

Sorry to hijack your post but I have a similar question.
I hold a British National (Overseas) passport and I have all my entry stamps on my passport. However, I don't have a single exit stamp when I leave the country. I went back to Hong Hong every summer during my undergraduate years and I can only recall my exit date because I kept my boarding pass (the end bit where it shows my name, date and month and my seat).

Would there be a problem when I apply for 10yrs ILR? Do I need to provide evidence on my exit date?

Thanks