Thanks for various comments from a number of members.
My DECT phones in UK have just died, so I have bought a pair of hybrid DECT/VOIP phones
https://secure.sipgate.co.uk/voipshop/siemens/gigaset_c475ipI have now mastered these impressive little boxes, and have them working with my landline, two virtual UK numbers from Sipgate and a
http://www.tpad.com/at-home/ which should be cheap for outgoing international calls.
Now back to the port blocking issue with CYTA's Netrunner, and maybe with other ISPs.
Can anyone comment. Have anyone a working VOIP installation, and iff so with which ISP. I might as well get this right first time round, even if it takes a little longer.