They are speed holes...
...they make the car go faster.
Also much better than smashed foglights for passing MOTs. I renovated the headlamps using an Autoglym kit, it worked well once I got the hang of it. Removed the rear lamps and did those too, annoyingly one came up like new while the other is still cloudy. Gave it the treatment 3 times and still no change.
Now the nearside inner CV gaiter has let go and spat grease everywhere. Too much rain to tackle that so far.