thebozeian - I'm pretty sure it's not a Nimrod, thanks though.
Mondogiwa,
1) Colour - honestly couldn't say other the it's dark in colour (possibly a dark grey), even in daylight the lights were to bright to look at it for
then a few seconds at a time.
2) I would have said about 1/2 the size of a 747.
3) Honestly couldn't say, other then the distinctive rumbling sound.
4) The only thing that stood out was how remarkable mundane the plane looked if you ignore the lights, the lights made it look "futuristic" but when
travelling away it just looked like an old cargo plane.
5) No, different directions. First time it was heading towards what was West Malling airfield in Kent, it's now a housing estate though, closed down
decades ago. the second time in the opposite direction. The third time it was in a different county just off the coast.
It's the lights that intrigue me, the first reaction of me and a mate when we first see it is that it was some kind of weather plane. I've no idea
why we got that impression though because we have no knowledge of the subject