Landships II

Came across this image on the IWM Collections website showing a 3 ton lorry with an 18 pounder in the back - has anyone come across this before, either in photographs or books etc? Would make an interesting model - also, can anyone ID the lorry from what can be seen?



http://www.iwmcollections.org.uk/dbtw-wpd/exec/dbtwpub.dll?AC=PREV_RECORD&XC=/dbtw-wpd/exec/dbtwpub.dll&BU=http%3A%2F%2Fwww.iwmcollections.org.uk%2FqryPhotoImg.php&TN=Uncat&SN=AUTO11208&SE=7353&RN=1&MR=25&TR=0&TX=1000&ES=0&CS=1&XP=&RF=phoResults&EF=&DF=phoDetails&RL=0&EL=0&DL=0&NP=1&ID=&MF=WPENGMSG.INI&MQ=&TI=0&DT=&ST=0&IR=0&NR=0&NB=0&SV=0&BG=0&FG=0&QS=