Thanks Forfarian and Lady Macbeth, I've just returned from short trip upto the area and was amazed to find that the farms they worked on are still called the same names! Alexander Crighton was a farm overseer or grieve. His father John was a ploughman in kingoldrum and around kirriemuir - Alexander worked on a couple of farms in tannadice, then appears in 1841 in maryton near montrose (got a picture of the grieve's house at powis farm!) - so far haven't found him for 1851 and 1861, although his daughter ann is listed as a servant in fearn in 1851. Alexander's son David - my g-g grandfather appears in London as a shipwright in 1865, but I don't know where he was between 1841 and 1865. Are there any passenger records for boats to london at that time?
The family on later censuses that I have managed to find are not that consistant with their birthplaces! Think moving around so much was confusing, but take your point about the two different parishes.
I have managed to find one death certificate, and as you say it had so much information - I need to find some others but haven't been successful as yet.
Thanks,
Ray