So having got a new Macbook Pro with Bluetooth LE I was looking forward to using handoff between the two devices, but nothing I tried worked. There were varying suggestions such deactivating handoff on either / both, and even removing and then re-adding the iCloud account from either / both. Again nothing I tried worked, until I read a single post on the apple discussions pages which simply said:

Airdrop must not be on!

I turned Airdrop off and lo and behold it worked immediately!

Tags: problem