your googling is wrong...
you may have found a site refering to US pints..
a pint is 20 fluid ounces in the UK.. the US is 16 fluid ounces..
so a uk pint is 1 1/4 US pints... hence is a US pint is 1lbs ( 16 ounces to a lb ) then a UK pint is 1.25lbs....
this of course depends on things like temperature and so on which would affect the density of the water and therefore how much water is in the glass...