Welcome to my website. It is hoped that it will be of interest to those already familiar with the fascinating world of electronic espionage, more commonly referred to as SIGINT (Signals Intelligence), and to the curious simply wanting to know more.

 By now most people will have heard of Bletchley Park and the operations there in WWII analysing the results of radio intercepts logged elsewhere. What many had not heard of and knew very little about until a few years ago was the work of GCHQ and its American counterpart NSA.

 The site contains a number of photographs taken by myself or former colleagues, mainly in the 1950s and 1960s in some of the locations where foreign radio transmissions were being intercepted. It  in no way attempts to reveal any details of present day sigint operations, mainly because I am not aware of how things are done these days and if I was I would not want to labled a 'whistle blower'.

Most of the information on this site is taken from my personal experiences and the experiences of former colleagues who have agreed to me using such and I am grateful for this. However, should any former Spec Ops or allied tradesmen wish to contribute a snippet, anecdote or photo related to their time on the ‘Y’, regardless of location,  I will be happy to include it on this site subject to suitability. Any such submissions will be attributed to the author who may use his/her name or a pseudonym.

In the section entitled, ‘My Bookshelf’ I list a number of books that I have read and believe may be of interest to those wishing to know more, particularly about the history of this subject. Where appropriate I have added a few personal comments. I make no apologies for listing, separately, my own modest effort; Special Operator, The Rise and Fall of a Cut-Price Spy, describing my eighteen year journey through the Sigint world.

 On the sub page entitled 'Listen to Numbers' you may find details of sites where one can learn more about intercepting foreign radio transmissions using a short-wave receiver in ones own home or anywhere else for that matter using one of the small portables available these days. I am aware that such activities are deemed illegal in a number of countries so I am not suggesting that one breaks the law. However, many thousands of hobbyists, including short-wave listeners throughout the world are doing this on a daily basis. Whilst it is true that many of these folk are only listening to and logging Radio Amateur and commercial radio transmissions there are others listening to the short-wave transmissions sent from a variety of diplomatic and other locations to secret agents located elsewhere.  These transmissions can be heard in both voice and Morse code. The text is always encoded so, whilst one can hear and take down the message, should one wish, one can never use what is heard to ones advantage, that really would be breaking the law. For anyone with an appetite for listening to and transcribing data type transmissions such as FSK (Frequency Shift Keying) or Polytones more information with frequencies and schedules is available via the Enigma 2000 website. This also applies to anyone already familiar with such transmissions and wishes to renew their interest in such.

I must add though that there are authorities in some countries, including some in Western Europe that simply do not believe that hobbies involving certain pastimes exist. The arrest and jailing of innocent ‘Plane Spotters’ in Greece in November 2001 and in March 2016 in the UAE and Kenya are examples. So, should you decide to take up this fascinating hobby, be extra carefull what you take with you and use when on holiday outside your own country.

Please note that all photographs on this site are subject to copyright and should not be copied or reused without permission.


Simon Walden

04.05.2022 19:53

Hi, does anyone remember Denis Walden who spent a number of years at the station?

Chris Boyd

05.05.2022 11:34

Hello Simon, first of all thanks for visiting my site. Regretably that is not a name known to me but hopefully someone may remember him. Best regards, Chris

Chris Boyd

18.02.2020 17:07

Like you David, your name is familiar but unless you were on 367 Aug 1951 - 53 then unlikely we met there.

David Gresswell ex 367SU, RAF

18.02.2020 10:59

I was pleased to read your reference to the history of 367SU. The web-site has been re-located to https://littlesaiwan-367su.wixsite.com/index ,since TalkTalk discontinued their web hosting. Thanks.

David Gresswell ex 367SU, RAF

18.02.2020 14:44

Hi Chris, well a very unexpected reply!! I recall your name but regret that I cannot remember whether we ever met?

Chris Boyd

18.02.2020 12:57

Thanks David, good to hear from you.

Brian R

21.04.2018 23:39

A fascinating read about a little-known, but vital service. Pleased that your experiences can now be shared and preserved.

Paul Beaumont

22.03.2018 08:05

Brilliant book!


20.09.2016 21:14

I am enjoying you book as you will have heard from another source. C


17.08.2016 15:22

Still working on the site. 32 years, 9 years longer than me Harry, you also must have some tales to tell.

Harry (Dixie) Dixon

17.08.2016 12:45

Chris, Al P passed the link to your web site to me. It should be very interesting. I left 'the job' after 32 years, in 1991. Your experiences will be quite interesting.

Latest comments

05.05 | 11:34

Hello Simon, first of all thanks for visiting my site. Regretably that is not a name known to me but hopefully someone may remember him. Best regards, Chris

04.05 | 19:53

Hi, does anyone remember Denis Walden who spent a number of years at the station?

27.12 | 13:17

Can't say for sure David as that was long after my time there, Do know however that until the closure the main interest would have continued to have been the Eastern Bloc.

26.12 | 18:34

What was the ACARA Linear Array aerial installation in the fields at CSOS Cheadle around 1966 used for?