Contract free broadband

Virgin do 30 day BB service ....250mb for 60 euro, 1 month is probably as close as you'll get to contract free

https://www.virginmedia.ie/broadband/buy-a-broadband-package/250-mb-freedom-broadband/

Probably ...what are you used to? virgin is unlimited also no caps on use

course you're aware this is fibre BB not phone line

Connects through the same line as tv ...they install a box if you don't have one, the same box gives tv and BB (ONLY BB if that's what your paying for)

but you get a phone line with it if that makes any sense .....phone connects through the modem

Yep that's all diy job .......unless they need to upgrade the box, check cover availability on their site for your area before you do anything, but if you had tv off them before you should get bb no problem

Magnet Networks provides no contract broadband - https://www.magnet.ie/residential/products/fatpipe-fibre-24-12-month/

Otherwise your only other option may be pay as you go mobile broadband or hotspotting off a smartphone

Isn't Virgin Media broadband via co-ax to the house?