BusLoverMum 19 Apr 2016, 9:18 pm #32 BusLoverMum BusLoverMum BusLoverMum Posts: 5367 Threads: 20 Joined: Jul 2015 Reputation: 2 RE: Red Arrows X1 Mystery beeping sound (19 Apr 2016, 8:01 pm)NK53 TKT wrote I noticed it for the first time today on the X9 You'll hear it everywhere, now you're listening for it! Reply