As you may be aware, you are perfectly capable of serving you own Notice on your neighbour with regard to your proposed works provided it is Valid. It must be signed and dated.
You will find on pages 30 — 43, of this explanatory booklet produced by the Department for Communities and Local Government, precedent letters or free party wall notices that will conform to requirements set out in the Party Wall etc. Act 1996.
You may choose to include that in the event of a dispute arising or having arisen, you would appoint George Fryd of GFA, 78 York Street, London, W1H 1DP.