I remember that deal, I was actually interested in that but decided to pay £400 for an i5 Zenbook, I like it more. I'm not sure if that deal was cheap because of a student discount. Or it was a strange colour if it was the John Lewis deal. I do remember a good deal on Lenovo on the specs you suggested, but without the OS. However, I can't say this is bad just because I found once or twice a better deal a while ago. Pretty much every price here was cheaper a while ago. What's important is what is available now and for how much. This is not my favourite laptop deal by far, but it is still somewhere on top, I don't vote hot only for number 1.
There was the possibility of an i5-1035g1 with an Nvidia MX330 dGPU for £420 with the lenovo ideapad 5 a bit back so I would disagree with heat on this.
Just the way it is. Any laptop that did meet the spec doesn't exist anymore I bet. Lower demand for it for something lighter, thinner etc. So now they're all chasing impracticality and profitability.
It's non-removable according to crucial website as well
On Amazon and scan it says max 8gb supported.