I assume that marram hills are sand dunes, covered in marram grass.

Four farthings in a penny, twelve pennies in a shilling, five shillings in a crown, four crowns (twenty shillings) in a pound, twenty-one shillings in a guinea. A florin was what we were supposed to call a 'two shilling piece', but most people didn't. There was also a half-crown, written 2/6 (two shillings and sixpence).

His conk is his nose.

Brown Windsor is a type of soup.

'boobed' is 'made a mistake', 'messed up'.

Anderson shelters were small bomb shelters constructed in people's gardens.