As of now they report:
Total repaid to investors £3,580,266,440
Total interest returned to investors £185,370,286
Now the use of the word "repaid" (as opposed to "paid out") might lead the unwary to suppose that this is return of capital, particularly since interest paid is shown in the next line. However RS have confirmed to me that the first figure includes interest. But interest is paid, not repaid, only capital is repaid.
Next consider these stats:
Total under management £657,905,933 (A)
Provision Fund cash balance £7,890,589
Expected PF Inflows £15,531,830
Total expected PF £23,422,419 (B)
Total capital returned (from first two figures above) £3,394,896,154 (C)
Total repayments by PF £226,307,256 (D)
Percentage paid by PF (D/C) 6.7% (E)
Expected demand on PF based on past (A*E) £44,079,698
So the PF can be expected to be only half what will be required even if the economic situation does not deteriorate, and unemployment does not go up.
If I have missed something or made an error please advise.