Originally Posted by: ShostakovichThanks every one for your replies and advice.

Yep! it is probably room temperature fluctuation. Still intrigues me though that the problem is predominantly the G string with a little bit of the B.

Cheers.

May want to see if those tuners are holding in place. On a guitar from years ago, I had a tuning peg that was too loosey-goosey and was a chronic tuning issue for me. May not be with yours and with an LP, no matter if the are the 'green ivory' ones or Grovers, they should be good.

...though you did not consider invisible pixies...just sayin'