One Big Switch have a deal for Pure Telecom. €25 per month for 12 months for all you can use broadband. Cheapest broadband deal anywhere at the moment. I haven't used as half way through a Virgin deal however a few friends of mine have used it and they all give it the thumbs up.

Get deal at https://onebigswitch.ie/campaigns/202007_broadband_pure/. You need to sign-up for One Big Switch to be access the deal.