Redirection for https://www.

You don't need to use semicolons and you can redirect with the HTTP::redirect command. This could also be done as part of an LTM traffic policy

when HTTP_REQUEST { 
    if {[string tolower [HTTP::host]] eq "www.oasiscard.co.uk"} { 
        HTTP::redirect "https://myoasiscard.co.uk/" 
    }
}