Yes. ABB is good as it's 128 points I'm assuming chemistry, physics and maths.
I am an engineer and worked in supporting young people getting into engineering and with industry to make them more accessible to under-represented groups.
Engineering is generally a four year degree. You can get a BEng after three years in some universities, but employers like a four year MEng degree.
This is a list of the Chemical Engineering ranking of universities.
https://www.thecompleteuniversityguide.co.uk/league-tables/rankings/chemical-engineering
I searched for Chemical Engineering Entry Requirements [university] (just Newcastle/Nottingham for example) and found the requirements very quickly.
For the top universities, AAA+ is required, but ABB is fine for Newcastle and Swansea, for example. They are 16 and 17 on the list, and they are great universities.
Go down the list and write down the requirements for each university. Some universities will ask for higher grades even if they are lower down the list, so it's worth checking the top 30, then deciding where he wants to go based on grades and location. Some of the London universities have nice campuses, so don't think he'll be on his own if he wants to go, but London is pricey.
I would recommend a campus university where the university is on one site with accommodation on site for first years as it's a great way to make friends and not worry too much about meals and rent.
The Scottish universities are great, but their systems are different.
He may wish to do the accelerated MEng Integrated Engineering Degree at NMITE which combines study and hands-on experience:
https://nmite.ac.uk/ It's a three year course covering four years of material. They will accept 112-144 points. It's a small university but excellent and it's a new way of studying.
TEDI London also do a condensed degree in design engineering, hands-on work and study. https://tedi-london.ac.uk/
The other option is to do a Higher Apprenticeship with a company which means hands-on training on the workplace and a sponsored degree which means he won't have any student debt.
This link is to the Institution of Chemical Engineering's (IChemE) young people pages which has loads of resources and information about university and apprentice routes into Chemical Engineering.
https://www.icheme.org/education-career/discoverchemeng/young-people/
I would recommend he gets in touch with the IChemE careers department by phone or email. They will be very supportive and he should join them as a student member when he starts his course or apprenticeship as he will meet a lot of other students, and other engineers and he will be on track to become a Chartered Engineer.
Good luck. Feel free to PM me if you have questions.