6in 26cwt howitzer, used in mixed regiments with 60pdr Mk IIs. The 5.5in eventually replaced both (and the 4.5in gun).They are usually correct, but the carriage looks more like that of the 4.5" to me.
The M1 mounting for the 155mm gun. We used these up 'til the advent of the US 8in M110 and 175mm M107 SPs. After they had been in storage for a while all were sold to India, where they were put into reserve for potential crowd control duties. And our liberals whinge about baton rounds!7.2" Mk 6, which used a US mount.