15 days in Ireland + 5 days in London

[andy]

Originally Posted by Marschel

Better get a 3 Austria SIM for both countries.

Whilst Three Austria's Like Home roaming is interesting, only calls home to Austria are going to be as cheap as while there, and calls locally in Ireland and then UK will be at roaming rates.

For someone willing to use a call through arrangement this might be OK, it does add extra complication,, including getting the SIM.

For UK, giffgaff might be interesting, especially now they introduced cheaper international calls after all this time. Three UK's new cheap PAYG rates might also be quite tempting, 3p/min calls and 1p/MB.