I've been thinking about the DART oneway fare of £4.90
I am wondering if the price was a copy of the Diabolo supplement for accessing Brussels airport's rail station, which is 5.70 euros (approx £4.95). The alternative is to walk 1.3 miles from Brussels airport to Zaventem railway station and then get a train to Brussels without paying the supplement. Oddly enough, from Luton airport's rail station to the airport via Kimpton Road is about 1.2 miles.
Yes, it's a lot to charge... but people travelling to/from Brussels do seem to pay
https://www.belgiantrain.be/en/ticke...ts/diabolo-fee