Right, first of all I need to apologise to you all for not quite be honest. I don't know why I said it was "a bedroom".
I mean it is a bedroom but there is also a kitchen within - openplan a granny annexe or studio kind of thing. Its big at 27sqm (5.2 x 5.2). There is definitely no bathroom - that's in another room.
Having misled slightly, I really can't expect any decent replies but just in case:
I thought I'd need 12 based on about a metre from the wall and about a metre between lights. Also I thought I read 150 lux for a bedroom and 300 for a kitchen so figured I'd need somewhere inbetween and 12 seemed to be the number giving that. In an ideal world that would mean more lights in the kitchen side but that would mean leds ceiling looking uneven with them mostly bunched to the kitchen. I did get adjustable ones which might help though.
You have definitely got me thinking though if I've got too many. Of course a lot of the "guides" out there are written by sites.....that....you guess it want to sell you as many downlights as possible.