Hello Vova585, Volvo U.K. says that they don't supply a replacement for the faulty motor and that the only option is to replace the whole headlight which can be bought for £1400!!
As you may surmise, I'm going to live with the fault.

Thanks again.

Thank you Vova585 for your suggestions, I will get around to investigating it eventually and let you know how I get on.

Hello, The nearside headlight has stopped "bending" when going around bends resulting in a fault message showing on the dashboard. My local garage tells me that the associated motor is faulty but cannot be removed from the headlight unit and the cost of a new headlight is too expensive for...