waiting staff in general in the uk has changed,waiting service used to be a trained person who went to a college learnt their trade ,and then went into the industry as a commis,then built their way up to chef du rang then on up the chain to matre de if they were good enough ,you would have a sommelier who would know all the wines to go with the dishes but now ,waiters are treated as second class job,but most have no idea,most can't pull a cork,I have seen waiters finish ducks,flame main meals and so on ,the service industry was a trade and people had passion for it,and this was rewarded by tipping..thats why i tip good service ,a waiter can make the difference of a good or bad experience,and it is a skill to get it just right,and believe me its a diminishing trade.if a good waiter does make the effort to make your meal memorable,leave a tip ,if they don't bother to try ,and expect atip,avoid the tipping,for me its simple