Gonzo - Thankyou for correcting those movements numbers. You are quite right ... it is 260000 additional movements. I now believe my original source was referring to number of additional aircraft visits (turnarounds) anticipated as opposed to runway movements. My error not picking up on that, and I'm pleased that you have pointed it out. I want my data to be accurate.
Of course, this does also mean that the contribution which would be made to London area airports capacity by new runways at Gatwick / Stansted included the same error. So those numbers are correspondingly higher (basically doubled) as well. The 74K and 161K figures quoted for shortfalls at regional airports are taken from a different source so these are as presented. The 15% number set to be ringfenced for domestic flights also stands.
Thanks again for highlighting the error.