Yeah this is something similar that happens to me. getting hit first before the guy pops out lol.
Just called Plus Net and they do not offer gaming package apparently - saw another broadband provider called Ghosts Broadband for gaming that apparently are good. So they said an engineer will call to answer technical questions. well lets see what they say about UDP packets.
IDNET have gaming package but too expensive. FTTP may be the only solution shame its not available readily.
I will call TalkTalk to see what they say. Will keep you updated.
it is shielded rj11 to rj11. They can be found on amazon and ebay (STP = shielded twisted pair and UTP unshielded twisted pair). You can buy custom made STP cables made from cat cables that have rj11's fitted on either end.