Short answer
Your written quotation confirms the delivery schedule for this wardrobe chapters commission, including cloth, production and destination. London's proposed visit window is DEC; dates and venues are confirmed individually.
A multi-piece programme may span more than one city window. The written quotation confirms its scope and schedule before the first cut.
London's window
The proposed DEC visit is the planning point for London commissions. Dates, venues and available appointments are confirmed individually in writing as the month approaches.
The itinerary is a proposal: months are planned, dates and venues confirmed individually. Final quotations are confirmed in writing before you commit.