What does ‘Builder’s tea’ mean?

The name of a strongly-brewed cup of English breakfast tea with milk — the way that tea is most commonly drunk in the UK.

It’s common courtesy to offer a labourer or builder working on your house a builder’s tea while they’re working — especially if they’re working out in the cold. This is probably how the term came about.

“A bacon sandwich and a builder’s tea. Now that’s a proper breakfast.”