Cheers guys for the replies, very helpful indeed. I am under the impression that the OSM map are the ones roadies use, may not be so (?)
They’re open source, so it depends what people have put on them. Round here (South East England) they’re very detailed indeed, better than OS because a number of the trails aren’t actual legal rights of way, they just exist. On an OS map you’re just riding across a blank space, whilst the OSMs show more.
They’re also far higher resolution, which on the 1000 makes a big difference. More accurate too – the OS maps are just a digital ‘scan’ of the paper maps, so you can often be riding 50ft off the side of a road. Plus they rotate as you do – with an OS map the labels are always orientated north up, so if you’re heading south all your labels are upside down, and will obscure roads and paths. With the OSM maps they move.
OSM > OS
IMO.
YMMV.