Believe it or not,examiners like sitting in a car that they know someone has pride in ,by the care thats gone into making it look that way,as long as its not OTT,they will also know in time,by the standard of the pupils presented for test that the instructor also has pride in making sure his/her pupils are well prepared for the test and drive at a standard that is well above the basic standard required.I always make sure the car is clean,inside and out before a test,if an instructor turns up in a car thats dirty and scruffy,they wonder about the standard of teaching that that particular instructor is capable of,eg. you wouldn't turn up for an interview for a job that normally requires a suit or equivalent wearing overalls or scruffy jeans and top would you,so presentation is important,says a lot about you and the pride you take in your work,I don't wear shirt and tie for teaching,I did,but its not practical for me,but smart/casual is fine for me.Good luck with your part 3.Simon your car looks really good and I'm sure the examiners and pupils will like driving it,everyone likes to be seen in a nice car,one examiner near me wouldn't get out of my last car cos she said she liked being in it too much,ha,shame it was mechanically crap,6 gearboxes,4 clutches and 3 power steering pumps in 2 1/2 years meant off the road a lot,I still think the GP looks better.