I’m excited there’s now a reasonably priced way to get from central London to Heathrow, without advance booking. On may way out last week I had to do the change at Paddington. Really looking forward to going straight to Tottenham Court Road from T4 on one go!
You know it isn't reasonably priced... It's still got a special airport surcharge of a whopping £12.80 each way, and still costs more than an airport transfer at pretty much every other European capital city.
According to citymapper crossrail shaves off a whole 7 minutes from my journey while costing £7 more. I'll probably keep taking the piccadilly unless I'm like, desperate for aircon or really late or something.
I've done that a few times with my Strida (admittedly checked rather than overhead compartment). You'd probably get away with bringing a Brompton as hand luggage, although it's technically slightly over the limit.