I was out looking for lyrids as sky was clear (21/04/20) as well as soace x satellites. an triangular craft emerged from north west over trees in garden and moved in a straight line to south east until it disappeared over house. the shape was a visible defined triangle, dark colour, either black or grey/metallic. 3 points all had a dim warm white light. the craft moved in the most perfect smooth motion and despite it being a quite night (covid lockdown, no background traffic noise) the craft moved completely silently. size is difficult to estimate as it depends on height of flight but i'd estimate it was 1-200ft from ground level & length would be approximately like a mid sized passenger airline (737). checked online after for any other sightings but none reported. there were no flights in or out of bhx airport within hours of this time (checked flight data)