Yesterday when i was on my horse coming back past sleap airfield near wem shrewsbury at about 6:10pm on my way to grinshill shrewsbury where i live. we had stopped by the airfield to rest for a few minutes when we heard an aeroplane approaching, and when it went over us it climbed and this black triangle aircraft or drone came up alongside it and then in front of it. the little aeroplane tried to move out of the way but ended up doing a circle back towards and away from us and this think just stayed in fornt of it. now i've seen all manner of heliopters, drone and jets fly in the local area due to raf shawbury being in the area, but this thing was weird. i managed to take a phot on my iphone 5 whichis below. the little aeroplane made a sound as normal but the black triangle thing seemed to make a high pitched humming sound. both went around twice and then th triangle shot straight up into cloud and we could nt see it anymore. we did however ride past a police car that was parked up about half a mile form the airfield and both police officers were looking up at the sky? with what was seen over the wrekin hill telford shropshire the other day i thought this may help etc. definately not a fighter jet or drone because the ones i have looked up online all have loud engines and don't look like this black triangle thing?