Bitcoin to transfer cash

I run a business in the UK that has close ties with Australia. We need to transfer cash back and forth (mostly Australia > UK), but the banks are a pain to use and take too long. If I started using BTC to do this then when it was sent to the UK, what would be the best way to get it into my bank account?

The fees are acceptable to us.

Amounts vary, but each transaction might be between £5k and £30k.

Anyone else doing this? Which exchanges / UK banks are good?

Cheers