I will have a light-hearted go at this. No idea what caused the 'ring', but I would guess that the apparent side lobes around no.4 engine are vortices generated above the wing by the use of the speedbrakes. Similarly, the line of condense behind the port wing is the remix of flow which has been displaced further aft by the boards. The a/c is descending and is probably no higher than 5,000ft (going by the lens used). I am not a spotter so I could be wrong! Looks like a low morning sun which would suggest a heading of south-east.