FOI - Formal decline to participate in Olympic Stadium review

As taken from the Moore Stephens Olympic Stadium Review Appendix 1, as commissioned by the Mayor of London, Sadiq Khan: "d) Declined our request:David Edmonds  LLDC Chair; Lord Sebastian Coe". Please can you confirm if both David Edmonds and Sebastian Coe formally responded to decline the request made to participate in the Moore Stephens Olympic Stadium Review and if so, please can you provide me with a copy of any formal response (letter or email correspondence) provided by David Edmonds and Sebastian Coe. If the declining of the request was made by telephone communication, please can you confirm.