Of course you can get better than that.
There are quite a few places on the mainland that just specialise in MOTs, nowt else, and you can just turn up early-doors and get a test done that day. All this booking nonsense is a load of pish.
Councils might have there own test centre and any test centre has to be open to the general public. Years back I used to go down the telephone exchange in town as the BT Motor Transport Worksop was there and did MOTs. No vested interest in drumming up business for unnecessary work there.
Shortest notice was just before VND took over Vari-ho. Went scouting around Ashington on a Saturday morning early-doors looking for a MOT testing station that wasn't a fast-fit place. Found a garage that did MOTs for 30 quid booked it for 10.30am. Guy took it round the yard unprompted with a Tapley to test the brakes. 11.15am had a fail on one light bulb and emissions. Said they could try and squeeze it in and sort it before 1pm when they closed, so I disappeared to Greggs for a steak bake. Came back with a nice pass cert and they only added 14 quid to the bill for the work. Sorted.
The last NCT that took 7 weeks and 4 phone calls - needless to say, as it was outside the 4 week window due to their booking incompetence I eventually got the €55 test fee refund I was due. Given that vehicle registration years were an annual issue in January up to 2013 AND the test due date is tied to the date the vehicle is registered, there is a massive bulge in the numbers of tests need in January. Whoever devised that system is/was a F&&kwit.

A couple of Dublin centres run round the clock at the minute to keep the backlog in check. Useless.
Not all bad down here. Have the pre-1980 test exemption which is a nice bonus!