Thanks for the reply, Andy_k and Pluggers.
I will do a search for the Labtec headset on the net later on for stockists and prices.
The bluetooth headset is not much use to me as I hardly use my mobile phone. There is no reception for the mobile phone on the tube ; when there is reception, the noise is so loud from the train and fellow passengers that I often don't hear my phone ringing.
Regards,
swl