Renunciation of executors and retirement from will trust

I have been asked to draft a deed of renunciation to be signed by one of the directors of behalf of a firm of solicitors with multiple directors who have been appointed as executors and trustees by the will. There remain 2 other executors and trustees under the will who will act as both executors and trustees.

Can we simply renounce probate and retire as trustee by the same deed and can one director sign on behalf of all directors?

I feel as if i should know the answer but I have a mental block!