The sudden change to warmer dryer weather after recent cool and wet conditions is good for creating sudden explosions of butterfly populations.
You should see a lot more Meadow Brown, Ringlet, Small Heath and Common Blue appearing over the next week or so followed by Grayling. The second brood of Green-veined White is also starting to appear now.
It is a good sign that you found Small Copper, the type of weather we have had this season does cause them problems and the population tends to crash. Small colonies of the type you tend to find around here can easily be wiped out.
Many of the Painted Ladies on the Angus coast will be the remanants of a wave of them that migrated in around the second week in June. The last time that the weather was favourable. So not only did they make it here but they have been hanging around for a month.
All the ones I see are also very faded. They are very strong flyers and can still go at a decent rate even when their wings tear in to strips. If the weather stays good you may get the chance to photograph some even more battered looking examples.
We often get another migration during early august so you may well get a chance to snap some in good condition later in the summer.