Mobile phones:

As expected, a huge response from readers about where to get hold of those magnetic/ferrite beads for reducing emissions from the hands-free wires to mobile phones. Here are some of the suppliers of the device: high street electronics shop Maplin (www.maplin.co.uk); CPC (www.cpc.co.uk); Healthy House (tel: 01453 752216); Bioflow (tel: 01531 822264); WillauTronic (www.cornishwaves.willau.com); Sprial of Tranquility (tel: 01295 788398).