Detailed floorplan drawings for planning permissions

Detailed floorplan drawings with key dimensions for a planning permission application. Combining two connected flats into one dwelling. Brief visit will be required. Central London flat, Notting Hill. Access any time, ASAP.
Required: drawing and measuring of flat A (Approx 750sq ft)
Drawing and measuring of flat A and flat B combined (approx 1400sq ft)

Drawings of elevation of combined flat A and B. We already have professional drawing of elevations of flat A that can we used as a template

Visit will probably take 1hr on site.