Thanks to everyone for replying, Jameso did drop me an email also.
I managed to find a store with a M and L in so took them for a very quick 5 minute ride and I was surprised how well the Large fit me, The medium honestly was the better fit.
I tried the Large and was very surprised how comfy I felt on it, The only issue I found was at reasonable stretch I was slightly short of the hood 10-15mm or so which the stem should sort.
Once moving I was fine, Ive never ridden CX or even Gravel I’m from a MTB only background until earlier this year when I bought my first road bike.
Arkose 4 ticks every box for me I can honestly say i think I should have bought this type of bike rather than the Rose Xeon CDX Di2 Ive got!
I like road riding for fitness and generally feel more rewarding doing a 110mile coast ride in 6:30 hours than the same time in the lakes on the MTB doing 14-15 mile!
Although the MTB rides are always 1000x more better
Also seen another review on Evans for Arkose 2 from someone similiar size than went for large.
“At 5’9” I was between sizes but managed to sit on a couple of arkose bikes (different models though) and decided to get a large then put a shorter stem (70mm) on it.
I’ve still not quite got my position right, being a mountain biker, but over all all its good. I’m enjoying the turn of speed I’m getting from it, handles well on light off road sections, it’s actually even better in mud than the mtb.”
Thanks again