Mouse Nest or "Cat Food"

Very mild day with warm sunshine, light breeze. Temperature around 14C, higher away from the coast.
My first 7 Spot Ladybird of the year was found in a garden in Sompting today, two others were close by.
Apart from the suspected Brimstone sighting last week, butterflies have been elusive although reports have been noted from nearby Mill Hill.
Despite the fine weather luring me to go in search of early lepidoptera, work commitments took priority.
A lot of activity in the garden from the Sparrows who are earnestly collecting the fluffy seed heads of the Pampas grass.
A female Blackbird has become engrossed in the task of collecting bits of dry grass roots and other suitable material from the area around the pond. With a beakfull she very cautiously makes her way to the privet hedge at the bottom of the neighbour's garden, checking all the way for any signs of the Magpies presence. She is being careful not to give away the location of her chosen nest site.
I have been turning the contents of my four compost bins to free up space in the first bin of the system. At the bottom of this one I came upon a Mouse nest. I was surprised to find twelve blind but hairy juveniles. I was careful to replace them in the restarted bin with as little disturbance as possible, enclosed in a polystyrene tray and cover in dry leaves. The parents will easily locate them when they return.