From their site: "The BEKO frost free fridge freezer models affected were manufactured between January 2000 and October 2006. These have a serial number that begins with either 00, 01, 02, 03, 04, 05 or 06. and this information can be found on a label inside the fridge (on the left). Beko is making a free of charge modification to all affected models, this modification takes approximately 30mins."
Free phone no: 0800 009 4837 - but I have not been able to get through on it.
So I wrote to them this morning at:
Beko (UK) Ltd
Beko House
Caxton Way
Watford
Hertfordshire WD18 8UF
Apparently it is ok to go on using the appliance for now, the risk is low, but this way I stop fretting!