What's this shrub?

[stuckinaswamp]

Does anyone know? Trying to work out how / when I should prune it, as it's getting unwieldy!

Looks like a Hebe

It's a Hebe. Keep it - all sorts of bees love it!
It needs little or no pruning, see link.
www.gardenseeker.com/pruning/pruning_hebes.htm

Definitely a hebe -not sure about pruning though,

Brilliant. Thank you for the quick responses!

You should find information here:

www.hebesoc.org/hebes_atoz/hebes_atoz.htm