Incorrect dating Liverpool LP set

LP-19 and LP-29 of the above real photo postcard set are views of the Mersey Tunnel. First use date is given as 1906, but the tunnel did not open until 1934. Looking at the street furniture on other cards and style of the backs I think the whole LP set dates from the post-war period.

Kind regards,

@duploduchess thanks again, updated the first use on this set: