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Lol your just car mad Paul nowt wrong with that 😁, always nice to have good Matt's in the car and it looks as clean inside as mine! any excuse to wash, wax or clean inside and am out there 😁

Any vehicles I've used with climate control work the same - the heater fans don't kick in (or do, but only at the lowest speed) until the engine starts to warm up, then increase as the engine warms. Usually there's a screen defrost button which puts the air flow to the screen, puts the air con on (even tho it doesn't work below at certain temp, usually 3 or 5 deg), and puts the fan on high. The police can't insist you have all windows clear. You need the screen, the front side windows and the wing mirrors clear (ie the same field of vision that a van/truck driver has at all times) . Except if you don't have a n/s mirror - then you also need the rear window clear.

Begin with the easy things - is the air filter old/choked, and when were the spark plugs last changed. My 2012 1.8 auto could get as low as low to mid 30's if driven fast on motorways, normal driving gave about 40, nun-like driving gave about 50.

On an Auris, I have recently made up one seat from two 'bad' ones. The pneumatic-style lumbar adjustment mechanism (air pump and bag and switch) was in the 'new' (breakers yard) seat, but not the old one, and was transferred across. So I have seen some of the Auris lumbar mechanism close up. I would expect it to be the same design in your car as both cars are from the same Toyota plant, and almost certainly the seats are made by Johnson Controls for Toyota, probably nearby (expensive to transport otherwise?). The inflate/deflate valve and pump are wrapped together in thin grey, vinyl wallet and live at the base of the seat back on the r/h side, on the inside of the major steel side support. On the Auris you can just see this module if the rear seat panel is unzipped completely (the Auris has two vertical zips on the seat back). Just follow the air tube back from the bladder in the seat back. I had no reason to look inside the vinyl bag to get a view of the motor/valve, as I had tested the unit out of the car before fitting. The unit is quite small and a label says it is made in Poland. It is almost completely silent in deflate mode, by the way, just a single click. It has three wires going to to the pump/valve, I imagine these are 12v. to air pump, ground, and 12v. to air release valve. Dismantling the seat is actually quite straightforward. Getting the seat out of the car is very tight, but you may not have to! Expect to find some rust on the seat frame, and look out for sharp edges on the steel pressings! I have no idea of the cost of this part, but this is a Toyota, so I would expect around £1bn + vat. But you may get a small discount if you ask nicely (10%). This picture is of the seat back without foam etc. as seen from the dashboard point of view. HTH

It may well be dreaded by all but I think that you will find that very, very few (in comparison to the no. of cars) actually develop an actuator problem. Sadly, earlier cars do seem more likeley to develop it than later ones - no doubt improvements due to experience gained over production life.