Ah well! Perhaps should have expected this.
Last update from dealer was an expected delivery to dealer of 13 March. Just had another update call saying anticipated delivery to dealer of 24th March. When questioned over the change the reply was that delivery to dealer was expected between 13 and 24 March, then they will need 4 days to ‘sort out with motability before we can take delivery.
So seems we are looking at end March which will be just 8 months from initial order.