Low-power mobile phone transmitters could soon be hidden inside hundreds of lampposts and telephone poles in UK cities.

The infrastructure arm of British Telecommunications, BT Wholesale, is currently testing the concealed low-power masts in Cardiff, Wales. If the trial is a success, similar masts are likely to be introduced in other busy cities around the UK.

BT Wholesale has already installed similar transmitters in the tops of public telephone booths in London. A couple of lampposts in the UK already conceal conventional transmitters, which are much more powerful.