If you rarely use trekking poles then carrying them is dead weight. Fizan make their compact poles for just over £50 I think that are really light. Alternatively I think BPL-UK sell tarp poles. If not them MLD from USA in carbon, or a few others over there too. Look at oookworks a UK firm. Might not be what you want or need but heard good things about them.
I use a black diamond and a MountainKing pole. Not light and only actually used as trekking poles when crossing streams, the rest of the time they're on my sack. Seriously need the fizans but not getting out enough to justify.
just bought the BPL-UK solo tarp at 1.75m x 2.75m and 290-ish grammes. trying it this weekend if it gets delivered. Not right size but a good tarp I think. they sell other tarps that might be better.
iirc there's bearpaw, a UK company. MLD are gd too. Look to American makers as 8x10 feet might be easier to find where they still use imperial.