Next up...
Trolley jack: Want to clean out the arches and then reapply some white underseal. Also, I have a strange click on coming to a stop and moving off, which I think could be the subframe squeak so I will try that fix and see what happens.
Service and MOT: Will get the oil changed, oil filter, perhaps new brakes and anything else that needs doing.
Spark plugs: Will try this myself, never changed spark plugs before.
Exhaust: Thinking Tegiwa
Footwell LEDs: I have the factory red lights in the footwell but they are very dim/subtle
Tegiwa carbon intake: Not sure of this one, not sure how much more noticeable it is compared to stock.
I will then stop, hopefully, but we'll see how that pans out haha