Woodpigeons mobbing magpies & Long-tailed tit back!

The magpies are still building their nest in the monkey puzzle tree opposite, however I noticed that the woodpigeons are mobbing the magpies, anyone else seen this behaviour?

1. Blackbird x 1
2. Blue Tit x 1
3. Carrion crow x 2 – fly over
4. Coal Tit x 1
5. Dunnock x 2
6. Long-tailed tit x 1
7. Magpie x 2
8. Woodpigeon x 3 – I noticed one of these was mobbing the magpies as they were making their nest. Anyone know if this is normal? I’ve seen it in song birds before but not woodpigeons.