Hi all, well im back to answer my own question in case anyone else was wondering.

Yes the positive OPK did show up out of the blue.

Today the lines were obviuosly exactly the same colour whereas yesterday the second line was almost invisible.

I have a feeling i got the tail end of the surge though so possibly Oing today not tomorrow (just going on ovarian pain and and a funny feeling..... also its possible my wee was a little bit diluted yesterday...???

Sunshine, i did use the clearblue digitals once, they worked ok but as i was not ovulating at the time they were all negative, so makes it hard to judge how effective they are for me.

Using Forelife and Discover this time and both work good. Got the positive on the forelife one today.