Hi and welcome to rootschat

,
following on from the 1891 census that Manchester Rambler has posted:
1911 -RG14 Piece: 22488.
1901 - RG13 3408 35 62
1881 - RG11 3600 20 37
He's also anglicised his middle name to Henry
Initially I was looking for a " George Henry" as George is another form of Jurgen . I didn't think of John - well done Manchester Rambler.
You may want to look
around 1864 for his immigration into Britain ,if what he said on census is to believed, as this seems to be when he came into Britain.
He should be in the 1871 census somewhere, Maybe he came over with his parents, he would have only been about 16 in 1864. He could be under be under his real name in 1871 the earlier days ,mistranscribed somewhere
A few online trees that I looked at have his parents as Johann Heinrich Myers and Elizabeth Lennett , but I really wouldn't go by that without checking out the hard factual documentation (there seems a lot of copying each others trees going on with the family ) .
None of the ones that I looked at have him in the 1871 census and I don't think any of the owners have his actual marriage cert ( as they haven't written his exact marriage date, or address etc, Their marriage date is just the quarter and address the reg district).
Does your friend have his marriage cert? What is his father's name and occupation according to his marriage cert? Are there any witnesses on the cert? What is his given address on his marriage cert in 1875 as it may help to locate him in the 1871 census.
Kind Regards
Ps I found a few candidates in 1871 but it is impossible to tell if it is him from the little information known, maybe his marriage cert would give some extra clues.