Derek Malcolm Wicks (died 1959) was adopted by Henry William Wicks and his wife, Caroline Ruth.
This is what I have so far.
26.3.26 Derek was born in London, I believe (I don't have a cert!)
21.06.26 he was issued with an emergency travel document by the British Embassy (Consular Section) in Paris
September 1927 he is on a passenger list with Caroline Ruth - so presumably he was living with the Wicks's by then.
31.08.28 there is an entry for him on the Adopted Children's Register.
Is there any more I can do to find out who he was ? - presumably he was not born with the surname Wicks