Tipping guidelines for Ireland

[hungryjoanne]

Hoping for some help from Irish chowhounds - I'm off for a two-week visit to Ireland, and would like to know what in what situations tipping is expected, and not expected. When it is appropriate to tip, how much?
Any advice or help is greatly appreciated!

[GreenDragon]

I have successfully done the 'have one for yourself' at a pub in Ardara, after several pints with a newly made friend, and some great discussions with her and the publican. He actually sat down after his shift and joined us for the pint :)

[JenJeninCT]

Some good info here:

http://goireland.about.com/od/prepari...

enjoy your trip

[Harters]

Yep, that link pretty much spells it out for both Ireland and the UK, in respect of restaurants.