I noticed a load of white butterflies on the hedges around the (hideous) Faraday 'monument' in the centre of the Nth E+C roundabout, I wondered how in heaven they got there, I bet they set wing from there to you!
They go across the channel sometimes, those things. Amazing. I've just had a HUGE bumble bee bumbling around in my flat lookng lost. I wonder if it was a queen, it was a monster and a very loud buzzer. I'm only on the first floor though, and have loads of flowers, so I'm always getting bees and butterflies.
I think honey bees have a range of six miles, I have seen loads of worker bees, a few butterflies, but as yet only a few bumblebees...thats when i can walk down the garden without falling over the bindwind, thistles etc..