So Paul is it cheaper to renew over getting a new one?
Sorry, I might have phrased that badly. When I said I renewed 10 years ago, I actually had a new passport issued. Even without the change to the new burgundy-red EU passports, I don't think they'll renew the current 10-year passports, will they? My old blue passport issued for 10 years in 1988 does have "This passport expires _____ unless extended" printed on it, but I'm guessing that was leftover wording from the days when they were initially issued for 5 years.
I'm working from memory, but if I recall correctly mom's passport which was issued in the very early 1950s was for 5 years and then had a renewal stamp for a further 5 years.
P.S. Note #7 inside the rear cover of the old blue passport, or on page 3 of the new red passport:
Caution. This passport remains the property of Her Majesty's Government in the United Kingdom and may be withdrawn at any time.
{.....}
The passport of a deceased person should be submitted for cancellation to the nearest such passport authority; it will be returned upon request.