Wow thank you all for your help! I will look for the id and take a photo tonight, I have inserted another picture to see if that helps solve the puzzle....
from what everyone has concluded so far I am leaning towards a Dolomite 1300 as I vaguely remember my father mentioning this engine but unfortunately I’m not able to ask him,
second question what what is something like this worth as it is not of use to me but maybe someone with knowledge and a need might want it.
thanks