When should you tip a waiter or waitress?

[rong]

Lol no 10% is standard

[kiwiMark]

Lol no 10% is standard

What does that mean? should I be tipping the delivery boy? taxi driver? When I asked around a tiny bit when I got here I was told to only tip in a (not fast food) restaruant, but I don't wanna be a cunt.

[rong]

What does that mean? should I be tipping the delivery boy? taxi driver? When I asked around a tiny bit when I got here I was told to only tip in a (not fast food) restaruant, but I don't wanna be a cunt.

Restaurant - 10% on average, +/- depending on service. This is the norm except in fancy places where maybe 15% is more standard.
Taxis - I rarely tip as they are so expensive anyway, but some areas are more reasonably priced in which case I'll round uo to the nearest quid or maybe the nearest note on a bigger fare if I like the guy but not as standard. However some people tip taxis as standard.
Delivery guy - not tipped as standard, but I was a pizza delivery guy while at university and I know how much the tip is appreciated so I'll typically round up to the nearest quid. I would say 1 in 5 households would tip delivery guys.