Buff-tailed bumble bee, with visible pollen baskets on its legs
Red tailed bumble bee (these flowers seem to be most popular at the moment. Its interesting to see how the bee activity and species changes as different flowers come into season).
Buff-tailed bumble bee in the yellow flags on the edge of the pond. The anthers are in the top flap of the flower which rubs along the bees back as it enters the flower.