The marriage of Richard Dixon to Elizabeth took place on 16 April 1854, Highgate, St. Michael. London Marriages & Banns (1754-1921) records Richard's age as 32, and his father Joseph Dixon.
England Births & Christenings (1538-1975), records the christening of a Richard Dixon, on 28 May 1823, Penrith, St. Andrews, the son of Joseph Dixon & Sarah.
There are two candidates for Sarah:
Sarah Hamilton who married Joseph Dixon, 18 November 1817 in Walton, Cumberland. As Walton is very close to Carlisle, I believe this Sarah unlikely.
Sarah Jon married Joseph in 1817, Renwick, Cumberland, a district close to Penrith. This Sarah was christened 14 April 1793, Renwick, Cumberland the daughter of William Jon & Anne Jackson.
Many candidates exist for a Jseph Dixon, although I suspect he was born 1887- 1890.