I had a P9 from work and had no issues with bluetooth on it
The M10Pro was able to connect to my bluetooth speaker over the weekend and was able to stream Spotify to it then when I tried connecting to it again, it doesn't work, so it appears to be intermittent.
Have turned off the bluetooth scanning in location settings as freitasm suggested and am able to connect to my bluetooth earphone. Will see how I get on with connecting to the speaker when I get home today.
Thanks for the replies and suggestion.