Hi
On Colney Hatch, because Annie died in 1924 - less than 100 years ago - her asylum records, ie case notes, are closed for access by the general public. There could well be a way round that, as you are a direct descendant, and if so then I imagine you would have to provide proof of relationship, maybe even the death certificate. How then you would get to see them, I don't know exactly. If they consent, you may find that you would have to visit LMA in person.
We need an expert on this - I'm sure there are plenty on rootschat!
Didn't see John at all in the records, nor any of the Campbells in the workhouse creed. But that was a quick look, it might be worthwhile checking again. I'm not sure if there is an A+D register for the relevant period, have to consult that LMA guide again!
It is a bit frustrating not knowing exactly when Alfred and Violet were admitted to the workhouse, and the address they had been living at.
And I agree with you, I can't really see the children being in the workhouse from December 1901 to March 1902? Although we could be wrong. If not, could they have been with a relative, or a friend of Annie's? Could John have then been adopted?
Leavesden School was the St Pancras workhouse school, in Hertfordshire.
Best general info on all this is on the workhouse website
http://www.workhouses.org.uk/StPancras/Her sister's details (I'm not great at reading this)
Kate Smith, Heghfield House, Eastnor Drive, Carlton, Nottingham
(I'm not sure they have got that address right!)
Colney Hatch became Friern Hospital. I think most of the St Pancras patients who were in asylums may have been there, or in Hanwell. Other asylums were opened 1890s/1900s. It doesn't look as though Annie was transferred at all, and yet she wasn't on the first Colney list I looked at in those Pancras records. Or else I missed her, or she was accidentally left off.
John