I don't know what can be done in the U.K., but for anyone receiving an Emira in the U.S. who's going to have PPF put on it, or just want to do this themselves, tell your dealer to NOT wash the car when it arrives. Leave it dirty just the way it arrives from Lotus. If you're going to have PPF put on it, they'll know how to properly wash it the first time so as to not put swirl or haze marks in the paint. If you're not getting PPF, and just want to do the first wash yourself, here's what to do and why.
When a car is freshly painted from the factory, it usually sits somewhere outside, or in the U.S. often sits outside or in a rail yard waiting to be loaded onto rail cars to be transported to various depot locations. As it sits in that environment, fine particles of whatever is in the air gets embedded into the soft clear coat on the paint. That can be airborne dust or even sand kicked up by vehicles, trucks, trains, shipyards, etc. All of that gets 'stuck' into the top layer of the clear coat.
That rail dust or environment dust does NOT come off with a simple hose down and soapy wash like you would see done at a dealership. When they wash the car like that and use an orbital polisher to polish it, that's when the fine particulate dust gets picked up from the surface and starts marking the surface. This is where the swirl and hazing marks come from. They create a scatter reflection layer into the clear coat, and when you wax it, now that swirl/haze is under the wax which scatters reflective light and diminishes the depth and color fidelity of the paint underneath. It can be corrected, but only with a lot of work and often having to use a swirl cutter polish which reduces the thickness of the clear coat.
To ensure this does not happen, DO NOT LET THE DEALER WASH THE CAR. To wash the car properly for its first wash, use a hose to rinse off the first immediate layer of dust and/or dirt. Then using soapy water and a cloth washing mitt, wash the surface in long continuous strokes in the same direction across the surfaces of the car. Do NOT swirl or use a circular washing motion. You're only removing the second layer of dust, the third layer which is stuck to the clear coat is still there. Air dry the car or just let it dry naturally.
Now comes the critical part. Using a clay bar (or I guess they now have clay bar gloves) follow the directions to wet the surface accordingly, and do the exact same thing you did with the soapy mitt. Move the bar in long continuous strokes in the same direction across the paint surfaces. This will pull all that particulate out of the surface of the clear coat without putting any swirl or haze marks in it. You don't need to apply pressure, just let the natural weight of the bar rest on the surface as you move it across the paint. You'll feel the bar grabbing initially as it's pulling that stuff out of the surface, but once it does, the bar will start to glide smoothly and easily across the surface. Use a soapy wash/rinse afterwards, dry with a microfiber towel, then apply wax or whatever surface treatment you use. If you're getting PPF, they'll do all that for you so it's done properly.
This may sound like a fair amount of work, and it is initially, but you only have to do it once. It's a one-day activity. This will ensure that your paint looks great for the life of the car as long as you keep it clean and waxed. Since there's no swirl haze on top of it, the paint color will have depth and look great.