https://www.decathlon.co.uk/triban-rc-520-disc-road-bike-navy-105-id_8554421.html
If you can stretch your budget a bit, this is superb bang for the buck.
If not
https://www.decathlon.co.uk/triban-rc-500-disc-road-bike-black-sora-id_8554410.html
This is also pretty good.
These two are my strongest contenders so far but looking at the non flat bar version its basically the same construction which makes me wonder if theres any point in the flat bar. Also being very overweight i need to check weight restrictions - should have mentioned this sooner so bigger tyres may be better. Most bikes seem to be within my limit however when i emailed decathlon they said the frame is only rated to 15.5 stone which is quite light considering most frames go much higher? I think this was just the rc520 so im querying on the RC500 flat bar.
I tried going to a independent shop today but they seemed to have mostly older stock or expensive bikes, they showed me a Giant Rapid 2 2018 which was nice but basically reminded me of the Triban 500.
Im pretty set on no suspension as per advice and would rather go more road than mtb side of the hybrid. I think from trying drop bar im not against it but equally knowing my commute i wont do it justice. Im trying to just get as road-y flat bar as possible that suits me.