Playing catch up...
Yesterday evening when we returned from a session at the gym I couldn't locate my phone, and eventually realised I'd left it on the exercycle. It has a black case and blends in too well! We phoned them first thing this morning and later in the day I went over to pick it up. As John said, I chose a good secure place to lose it! While in the gym carpark I spotted this moss and lichen, obviously an area that gets little sun.