If he'd had it done through NHS bowel screening, the cutoff for referral is actually 120! It's only 10 and above for GP requested tests, which is when someone goes with bowel symptoms. 7 is still a very low number and, without any other indications, such as anaemia, persistent change in bowel habits or pain, he is still very low risk.
My fit last year was 23, I had a colonoscopy and it was a bleeding polyp.
Your OH could ask GP to do a full blood count as this would show up any anaemia, which could then trigger a referral. Does he have a history of constipation, piles etc? Because it could just as easily be a pile that has slightly bled, also very common.