Wow, I can see I have come to the right place. Thank you all for the considered responses.
To clarify the questions raised:
1. He uses Alfred and Albert interchangeably as Christian name
2. We only have Alf's death certificate. Died 1943 in St Mary's hospital, Luton of TB. Occupation says 'Engineers Labourer' (Waiter) - no other helpful information is contained in this certificate.
3. We have been unable to identify an exact birth date or a certificate because we are unsure of location of birth or actual year/month and even his name (see later). We only surmise his 1943 death which gives his age of 43 was accurately recorded - hence circa 1900.
4. Ditto for war record; nothing to start a search. Unless he can be traced as having signed up in 1939 and a link to his employment and known address can be cross referenced? He certainly isn't on the 1939 Register, so how he would have managed without an ID card or ration card is unknown - unless he was by then signed up? Perhaps he tried to join but was medically discharged with signs of the impending TB? He is later in 1940 at Arlington Road
5 His partner with whom he had 4 children was Martha (Madge) Wentworth born 1902 - both used the surname of Wilson, but there is no evidence of a marriage actually taking place. Therefore no more information there.
6. The 1931 census was virtually destroyed, and the 1911 and 1921 census has so far shown nothing that I can obviously see - but I'm no expert at this.
7. On 3 children's birth certificates he states he was at the following addresses?
a. 1934 - 166 Hampstead Road, St Pancras
b. 1938 - 2 Dalby Street (NW5?)
c. 1940 - 220 Arlington Road, Camden.
8. My Mother recalls he often would bring home 'cakes and sandwiches' after a shift for they were mightily grateful as times were hard. This seems to tie in with a waiter or restaurant car attendant.
Now to complicate matters. It is just possible that Wilson was an assumed name. 'Madge' suffered from Alzheimer's and in a moment of lucidity, blurted out 'you won't find him - he was a Speers). Variants of Speirs/Spiers/Spears - plural and singular have so far not produced anything. If it's true, did he use this 'given name' for official documentation and or employment?
It's a picture of a man who is avoiding something. But I'm convinced if I can track down his railway employment and or potential 1939 military registration, it will produce leads to follow.
Grateful for any more input/advice or assistance.
Bob