Clinic Consultation Floor Plan Design

We are looking for a freelance architect or architectural technician to produce initial concept/feasibility drawings for a proposed two-storey rear extension to an existing GP surgery in England.
At this stage, we do not require full Building Regulations packages or pinpoint survey accuracy. We need a clear, professional draft layout to demonstrate our spatial intent for an initial proposal/pre-application review.
Scope of Work:
Bullet Proposed Design: A two-storey rear extension incorporating:
Bullet Two new clinical consultation rooms — specifically one on the ground floor and one on the first floor.
Bullet A small passenger lift (elevator) to ensure full step-free patient accessibility to the first floor.
Bullet Basic circulation/corridor integration with the existing premises on both levels.
Bullet Deliverables:
Bullet Indicative existing vs. proposed floor plans (2D) for both ground and first floors.
Bullet Basic proposed rear/side elevations or massing sketch to illustrate scale.
Bullet A simple block/site layout showing the footprint within the rear plot.
What We Will Provide:
Bullet The exact property location/postcode (for map/satellite reference).
Bullet Approximate measurements of the plot and available rear extension space.