Circular, it looks at bit odd. I have just looked at Economics.
They claim 14% of applicants to the LSE get offers whilst 60% of applicants to Warwick do. Yet the UCAS points required for LSE is 380-400 and the UCAS points for Warwick 480-500. UCL is 30% acceptance and 420 UCAS points.
LSE's own site says in 2013 they had 2,747 applicants for 211 places, so a 14% acceptance rate sounds about right. Warwick though on its open day warned they would have 2000+ qualified candidates (eg those likely to meet entry criteria) and only places for, from memory, 350, so 60% looks off. The standard offers are slightly different AAAE as opposed to AAAa but there is not much in it, so again the site looks off. Warwick though seems to have a habit of offering unsuccessful candidates Tesco style substitutions in unrelated departments, which may account for the higher reported offer rate.
Effectively both have far more qualified applicants than places, and so are likely to hang onto a number of applications until well after the January deadline. Given many will have applied before early October (which is the Oxbridge deadline) it is a long wait.
Can't find application numbers on the UCL site.
The quick way to find out which Universities and Departments kept students waiting a long time is to look at the Student Room threads for the previous year.
Not necessarily the Universities fault. These courses are very popular and it is hard to see why Oxbridge courses, even those with lower applicant numbers, and medicine are allowed early deadlines to allow for timely processing, but not London/Warwick/Durham.