The basis for the calculations made in chapter 3, pp. 70–84, is set out below. Original data is available in Figure 1 and Table 2, pp. 74 and 80), and all figures are corrected to one decimal place.

(1) Attendance of ministers

Average attendance for Period 1 (FP(36) 32–42, 14 November 1938–11 April 1939, including Anderson, present for one item only at FP(36) 33 = 8.1 Ministers per meeting (89/11).

Average attendance for Pmod 2 (FP(36) 43–61,19 April–25 August 1939, but excluding Meetings 46,51,52,55 and 61, which were not concerned with the Soviet issue) = 9.9 Ministers per meeting (138/14).

Runciman was absent abroad for the period 27 March–19 May 1939

inclusive, i.e. eleven meetings, of which one in the second period was not concerned with the USSR. Five of his absences fall into each period. Adding 5 to the total for each period would alter the averages to 8.5 and 10.2 respectively, a difference of 1.7 rather than 1.8. Runciman therefore cancels out.

Chatfleld and Morrison did not join the Committee until 8 February 1939. In order to adjust the figures for the weighting in favour of Period 2 that would otherwise occur we need to add (on the assumption of nearly full attendance for both over 5 missed meetings), say, 9 to the total attendances for Period 1. This leaves an average attendance of 8.9, as compared to 9.9 for Period 2. So the true increase in ministerial attendance from Period 1 to Period 2 is 9.9 – 8.9 = 1.0.