'Builder's Tea', it's just tea surely ?
Would you ask builders if they wanted builder's tea ?
This smacks of journalistic classist tosh (or should that be splosh) to my ears .
The phrase even has it's own er... weak Wikipedia entry; I also see (from one of the sources listed at the foot of it), the apostrophe being placed at the end of the word builders, i.e. builders' tea, surely if it's referring to serving multiple builders it should be builder's', meaning - 'builders (plural) their tea'.
'One apostrophe or two with that BT mate ?'
Just off to make a 'litter-picker's latte' (aka, milky coffee) myself, instant coffee made with milk in the microwave, I used to make this to cheer myself upon rising at 4a.m. to clean the mean streets of the First Garden City.