I have to agree with livingstone here. OP needs to change mindset and improve self awareness. It is a hard and unforgiving job market these days and a lot of people find themselves on the outer, sometimes it is tempting to retreat into bigging yourself up as a defence from rejection but it makes you come over as having a chip on your shoulder.
Like livingstone says your CV is not great you have exaggerated it a bit. Employers use A levels like they use a degree as a way of signalling ability....which is why most graduate schemes want people with As and Bs. If you have BBC etc it may be possible to get the benefit of the doubt but CDE is a long way off the pace. Getting a 1st at Kingston tells them that you are credible academically, they will infer from that that you underachieved for whatever reason at A level so ended up going to a lower ranked university than you perhaps could have done, but at least you knuckled down there and did well. Same with the MSc that will also help. BUT you have to accept that in terms of finding your selling point, you are onto a loser, if you try and play the academic card. Claiming Cranfield is world renowned is one of the exaggerations, you're trying to justify it on here but the Cambridge, Imperial graduates wouldn't have to justify it. If it is good in its field then that will get you respect but I think from starting off with CDE at A level the best you can hope for is respect on the academic front.
With the other experience it sounds like you have shown you can hold down a job but you haven't moved on, you've just stood still for seven years. This is not uncommon and a lot of late 20s graduates get in this situation when they take a non-grad job out of uni as a 'temporary measure' and then get stuck there for several years. But you will have some competencies in this that you can make the most of.
There is not much else to say other than keep going and stop the mindset that your A levels will hold you back. One of my stepbrothers got into one of the most competitive graduate schemes in the country aged 27 after having done nothing but a sports science degree and worked in retail in a clothes shop for a few years, because he just had the gift of the gab to be able to blag all sorts of competencies out of his blatantly average CV. There will be a lot more students in this situation in a few years time but haven't realised it yet, including half of the bigmouths on TSR who reckon they're going to work in IB but won't make it.