About SDI

Proprietor: Caley Hardcastle


We are a small family business started in 1979 by my late father Brian Hardcastle, and joined by myself, Caley Hardcastle in 1988 (Aged 16). My Dad, Brian had by this time built up a good reputable business that I was keen and proud to join.

In the early 1990’s with the arrival of extra TV channels via Satellite, we began to travel further afield as pioneer motorised dish installers, quickly moving on to installing larger more complex aerial systems (Working on most Argos stores throughout the UK)

My Dad and I worked very well together as we enjoyed each others company and shared many interests. We have always kept upto date with the latest technology and relished the challenges that it imposed.


In 1998 I started " Surefix Digital Installations" (SDI) when we took on a five year contract from Granada Home Technology’s working on the "Transmitter Adjustment Programme". This work was mainly solving interference & general reception problems caused by the first digital transmissions and was carried out nationwide. Brian favoured working locally and only travelled to the larger more interesting jobs as he was heading for retirement, whilst my staff and I travelled the country as far as Poole in Dorset installing aerials and gaining vast new knowledge in Digital Transmission along the way.

Brian Hardcastle

Although Brian retired in 2005 we still enjoyed working together on certain projects right up to his sad and sudden death in August 2007. Brian had clearly laid the foundations of Surefix Aerials allowing me to build and continue with the work of Surefix Digital Installations (SDI).

Surefix Today

Over the years we have worked on many exciting new, unique and tailored systems, from remote antennas feeding previous reception black spots to cabling up static caravan parks and large commercial apartment blocks. However it’s domestic TV aerial and satellite installation that remains our main source of work.

We have built up a strong customer base and pride ourselves on our work. It’s our attention to detail our customers appreciate, from discreet cable runs to general care of our work. Our reputation is of the utmost importance and we therefore maintain a high standard of work.

As Confederation of Aerial Industries (CAI) members for over 20 years we are proud to work to their standards and conform to the "C.A.I. Code of practice". as such you installation is fully guaranteed.




  • Use Quality Products
  • Prompt
  • Fair Priced
  • Clean and Tidy
  • Pleasant to deal with
  • Trustworthy

Surefix Digital Installations cover all types of TV Aerial & Satellite work from domestic repairs to large multipoint communal systems, CCTV, Access Control and Data Cabling.

We look forward to to opportunity of providing you with our services.

Caley Hardcastle (Proprietor)
Surefix Digital Installations (SDI)