Rriisshhii,
congratulations, that seems like a well thought out plan to me, so best of luck with it, hope it works out for you.
Only thing I would add to your list is that I would add a lump of wedge on (say at least £5k) to budget for things you just can't forsee (for example, every year I've been looking at aviation, the CAA fees have gone up, so if you're plan crosses the year divisions, you could suddenly end up with higher costs!)
Also - for ATPL ground school, and it's not much, but figure in 2 x bristol ground school database registrations at £100 total (unless it's changed).
good luck with it, enjoy Uni - but if you want to do the two together, you'll require a LOT of self discipline