I finally got around to making a doctor's appointment.

My hands looked o.k. whilst I was with the doctor, despite not having worn gloves all day. From my description of the symptoms and the circumstances under which they occur, he was certain that it's Reynauds.
He felt my pulse and reckoned that it is so strong that he can rule out any possibility of an underlying blockage.
Basically I'm now a relatively happy bunny ..... just need to keep good gloves to hand, particularly at this time of the year.

Ian.