6/99 & 6/110 (1959 to 1964) - Standard tyre was a 700-14 crossply. This is no longer available, and so a 185R14 radial could be fitted instead.
6/110 (1964 to 1968) - Standard tyre was a 750-13. Dunlop records suggest a 205SR13 radial was offered as an option on the later cars. Neither of these sizes is currently available, and so a 725R13 radial could be a suitable replacement.
Wolseley's take on the big BMC Farina. Lots of luxury, big engines and excellent performance. Famously the peak police car of the early 1960s.