Hi miss mcmurdy
The best time is around 2-3pm in the afternoon, but u need to have held your urine for about 4 hours & not have drank excessively beforehand. I know some women who test 2-3 times a day so they don't miss the surge but mid afternoon has always been very accurate for me. If you're not at home could u just pop to toilet for a couple of mins somewhere? It doesn't matter if it's not bang on a certain time, if you hold your wee you should get accurate results.
Well! Update on me, after feeling really fed up with the clearblue digi advanced opks, I decided to test again today. I couldn't find the old digi opks anywhere, so was planning to get some ordinary ones. But there in super drug was a pack of the old ones. Took them up to the till & the best bit of all, they were £1!!! As have been discontinued. (This was my fear as couldn't find them anywhere apart from online) so got a box of 10 normal price £29.99 for a pound! Last box as always was so happy, have just tested at my normal afternoon time & got a smiley, all ready for BD tonight!
I think the new advanced ones don't necessarily give a false positive but pick up the LH surge sooner because they are constantly measuring changes in your hormones. I don't like them and if I'm not lucky enough to fall this month I'm going to stock up on loads of the regular ones from the internet