Second, I think is that if there was to be a need for the fitter to return for whatever reason, they are more likely if they’re local over someone that is from a national firm.
Pitfalls of using a nation aerial company
Also, as opposed to using a local firm, if there is the need to have the national company call back due to a problem, this may be difficult to tie them down to do. A local firm is much more likely to call back and fix any fault as they are reliant on keeping their reputation in high standing in the local area.
Do I have to Pay VAT on my aerial installation?
Using a larger firm will almost always lead to a larger bill for the same service and equipment being fitted. This can seem a little unfair but it is what it is, and is often why National firms do charge more money for their services.
What Guarantee should I expect?
How long does a TV aerial last?

There are plenty of aerial fitters still using the cheapest aerials on the market. Some of these aerials are lucky if they last out the year. Although they can survive and work well if set up properly in a loft, but they fair very badly if installed outside. Eventually the British weather causes them to fail.

How much does a TV Aerial Installation cost?
On average the cost of an aerial installation to one room in the home costs approximately £165.00. However, it does depend on where on the property it is going, and other factors. So in reality prices will range from £130 - £200 for an aerial to be installed on the property.