On 11/09/2016 15:04, Dave Liquorice wrote:


Mechanical meters should be changed every ten years, the old ones
(used to?) go back, be refurbished, recertified and given a new
number. The two digits between the two letters at the start of the
number are the year of certification, we have 67, 80 and 96. So much
for the 10 year replacement cycle...


Nerdy point: the "10 year rule" is that when a *new design* of meter was
approved it could not be certified *initially* for more than (for
mechanical meters) 10 years. But monitoring how they work in use can
result in that period being increased. There's a list at
https://www.gov.uk/government/public...tricity-meters


--
Robin
reply-to address is (intended to be) valid