A new daily Flybe service connecting Heathrow with Isle of Man will commence as early as 21st April! The route will be operated by Flybe Dash8-Q400 aircraft and is on sale now.
https://www.flybe.com/cheap-flights/isle-of-man
Quite a short lead time for bookings but i wonder if its something they've been working on for a while. I presume this will be another PSO type route?
Flybe are certainly getting quite an operation at LHR and definitely giving travellers more choice and connection opportunities with other airlines.