Hi Imber and Daisypetal,
Many thanks for sharing with me these thoughts and information you have found on the web.
In the last couple of years some of my research has paid off and I met an elderly lady who remembered seeing Leslie John Horwood in the uniform of the Royal Artillery at a Flamstead village event during WW2. So, it now appears as though he had joined up but must, pretty soon thereafter, have been invalided out with the TB that eventually killed him. At least that is what all the clues point to having happened. I even found a local newspaper article (Hemel Hempstead Gazette 22 April 1944) from the time confirming much of this.
On Daisypetals comment about information on the website she found I have to admit that I think that is an outstanding website and obviously a work of great skill and knowledge - but then again (says I - strongly tongue in cheek) I would say that wouldn't I as I am the individual that created it.
So, yes, that website is one of the ways in which I have been circulating some of the basic information i have collected in the hope it might be found by others researching the Flamstead names.
Thanks, once again, to the both of you.
Simon