How did this happen? I was logged in, loaded my draft which consisted only of the subject and first line, spent 2 hours writing up - pressed Preview and wow! I'm not logged in any more and it all disappears

Shame the story can't be saved as you go along without having to actually submit.
Anyway, let's try again. I'll Submit from time to time and then edit to continue.
Taken by minibus to Pitres and then walking from Pitres through chestnut and encina (oak - the national tree of Spain) forests. In the woods we spotted many birds and flowers, but no butterflies other than a Speckled Wood which was so much more orange than our British variety it took me a while to realise what it was. Once out of the woods we followed the watercourses which provided lovely habitats for all manner of wildlife.
First off was a pair of Southern Brown Argus (Aricia cramera - thanks Padfield!)
and then a Marsh Fritillary beckeri form (thanks, David M!)
More in the sun and less in the shade were Small Heath (David M corrects me here - it's a Meadow Brown but 'might be Dusky Meadow Brown. It has that 'stonewashed' look to the hindwing underside'.)
and a Hummingbird Hawkmoth caused a lot of excitement
I was thrilled to capture a Blue Spot Hairstreak which posed beautifully for me
and then spent a while chasing down this Clouded Yellow
I was delighted with the Moroccan Orange-tips
and the Long-tailed Blue which, when I checked the photo, was in the process of laying an egg although unfortunately the egg is hidden from view
I had been disappointed to miss a Swallowtail but then a Scarce Swallowtail arrived and spent some time nectaring on lavender
Meanwhile the rest of the party had moved on, leaving me and Peter concentrating on the Swallowtail. When we looked up there was nobody in sight and it was a while before contact was made by phone and we were reunited!
Another Wall Brown (Large, I think, although much more orange on its upper hind wings than the examples I have seen online)
followed by some gorgeous Common Blues
Finally I saw this lovely fritillary which I think is a Knapweed Fritillary - but as with all of my sightings, I'm open to correction.