Easier said than done if you travel a lot, especially with the anachronisistic UK Passport Office.
Total bollocks there HT. My wife renewed hers online recently, very simple process and had the new one within 4 days. I had to go to the passport office to get a new one for myself last year because I didn’t have two unstamped pages together which was a visa requirement.......I had my new passport same day, and spent less than 5 mins in a queue.