Yes, an aerial could be installed in your garden or on outbuildings. This will depend on the strength of the signal in your area. A professional aerial installation company will be able to advise you on the possible locations for an aerial on your property.
The historic market town of Bishop's Stortford can be found in East Hertfordshire within the East of England. This is the closest big town to London's Stansted Airport and it is within the London commuter belt. Bishop's Stortford contains a populace of 34,826 and the area was voted as the 7th best area to live in the UK in 2006. For house improvements you're contemplating, make sure to evaluate quotes from vetted specialists in the area and get the very best price for the work you need completed.