Hi, Can you please provide the specifications/measurements for each item. E.g. what are the measurements for the cylinder, latch and deadlock.

When you say cylinder, I have assumed you mean the security cylinder pull body?  50mm wide x 80mm high x 20mm deep. 
The Night latch body is 86mm x 90mm x 59mm, lastly the deadlock body is 79mm deep 89mm height – back set is 56mm – with a cylinder 70mm long.  The faceplate of the deadlock is 26mm x 134mm.