Hello everyone! I'm visiting the UK for the first time in August and am starting to get really excited! One of the last items on my "to do" list before my trip is to book my transfer between Gatwick and Heathrow airports. I'm arriving early on a Sunday morning from Ft. Lauderdale then have a flight to Edinburgh a few hours later (don't worry, I knew to give myself plenty of time!). A taxi or Uber/Lyft is out of the question just based on price (though that'll be a last resort in case of emergency), so I've been looking at various bus companies. National Express and others seem to be pretty reasonable (no more than £20 or so), so is there any company y'all would recommend to either use or outright avoid? Anything I should be aware of when making a bus booking in general? Thanks in advance for any tips you can provide!