The five people I know who've had tests at the drive through places were all throat swab then nasopharyngeal[1] swab.
1. Finally I've managed to spell it properly.
I did the home test swab today. Currently awaiting courier. My sample is in the fridge in the supplied packaging. I’m doing the home test as part of the randomised NHS / Imperial College testing that is being done, not because of symptoms or being asked to be track and trace etc.
First you do a swab from both tonsils, rotating the swab 10 times each. Then you swab each nostril , inserting swab horizontally 1 inch or until you feel resistance. The nose you rotate the swab 5 times each. Then put swab in phial break off end of stick, and screw on lid Then put phial in biohazard bag, seal that etc. These are the instructions from the NHS booklet that comes with the kit. The booklet includes 11 pages of stuff covering how to do it to yourself, how to do it with someone under 18, and young children. Plus a video link to watch before doing swab.
The throat one is uncomfortable and made me gag. The video says if you are not gagging the swab is likely not far enough back. So you just pause between tonsils to get gag out of way then resist gag when doing second tonsil. The nose bit was fine in comparison.