The available methods for digital television reception for Horsham are:

Freeview via aerials
Freesat via satellite dish
Sky via satellite dish
Broadband



Digital Freeview (UHF Terrestrial)

Horsham & most of the local area, is advised via an inadequate post-code database source such as the "Freeview" or the DTG (Digital Television Group) websites, that Freeview or digital terrestrial signal reception is mostly unavailable. This incorrect information is totally wrong & very misleading, as the majority of the area can receive these signals without to many issues. Many sub-standard receiving aerials even produce the levels for digital reception without any need for an upgrade. I would advise anyone wishing to receive digital reception too acquire a digital Freeview receiver to see what reception they can receive.

Midhurst our designated transmitter is technically poor, but via an approved system installation & adequate signal reception path, approximately 65 digital channels can be received (TV/radio/subscription) See channel list page.

Digital reception requires a quality signal at the required strength.

If terrestrial signal reception proves to be inadequate, then an upgrade may be required. This would involve installing a system that will acquire the correct required strength & quality signal level. Unfortunately just by changing from a basic standard so called "analogue" aerial too a digital compatible/benchmarked aerial, may not provide the required levels & significant reception improvements. 
Digital compatible/benchmarked aerials are approved to eliminate/reject interference to correct standards, most are also higher gain which is of benefit in low/fringe reception areas or poor Transmitted signals. One of the most important parts of any receiving system is the coaxial cable, which transfers the captured signal to the receiving equipment (TV/digital receiver) sub-standard coaxial will allow interference ingress & significantly reduce the captured signal levels. 
For example: At high frequency UHF TV band, 100 meters of sub-standard coaxial, the approximate loss would be 70-80%, using benchmarked coaxial the approximately loss would be 15-20%. There is no benefit if optimum reception is required to use inferior coaxial cable.  

Please have a look at my honest upfront costs on the installations page, estimated costs for services & installations.