What a coincidence to read your blog on the Speckled Wood. Last weekend I had a Speckled Wood in my garden in Peterborough for the first time ever. This is a butterfly I have never seen before, despite reading in one of my butterfly books that it's not uncommon. My visitor just sat by our feet on a warm patio slab, allowing me time to go and fetch my book and confirm its ID.
So far this April I've only spotted the occasional Small Tortoiseshell, a Peacock, and a tiny Holly Blue.
No sign (yet) of two other early fliers I usually see in April – the Orange Tip and Brimstone.