Can I borrow your crystal ball, please? It'll save me actually having to do any work such as squander time getting that pesky data needed for my next paper. I'm certainly not going to hazard a guess as to the ultimate number of deaths as there is jst too many variables, and we are still far too early into this outbreak to make any meaningful guess. Note that even that US group ran models multiple times and got results that ranged between 14,500 and 219,000. The reported figure was just the average (and the Guardian doesn't even say whether or not this was the median or mean - I thought it was supposed to be a quality paper?). Such variability indicates these sort of predictions are of limited use.
What I can say is the UK is doing significantly worse than Italy and France (and Spain, but I haven't plotted the Spanish numbers below):
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Currently, we're doing worse than any major European country. We will be fortunate if our ultimate number of deaths is similar to that of Italy.