On checking, I have a feeling it was the hospital originally known as the Portsea Island Union Infirmary in Milton Street, later part of St. Mary's Hospital. The Hospitals Database gives the postcode as PO3 6AD, although I don't think it's open now. Just to keep you on your toes you understand ...
Thanks for the link ....
I've seen a reference to the Portsea Infirmary, although I didnt know its address
I think Queen Alexandra in Cosham which was for military only until after WW2, was built to replace the Portsea Infirmary
I've looked at the history of St Mary's and it only refers to WW2, no reference to WW1, so not exactly sure when it was built
Do you have Hilsea Military Hospital in your database, I've seen reference to it, but can find little information
It apparantly was taking only VD cases at the end of WW1