Thank you Sunday. Its been an eventful month to put it mildly.
As said before, no parts of Hong Kong were abandoned. It would have been impossible to hold onto half a city when the Communists owned ALL the reservoirs. To keep Hong Kong, we would have had to keep regularly importing icebergs. Besides, splitting cities never works very well. Ask a Berliner.
As for Gibraltar, its pretty clear the Blair Government were willing to throw Gibraltar under the bus to get support from Spain on various issues in the EU. That only ended when the leadership of Spain changed. All looks a bit short sighted now, but that was our Tony for you.
Seems you are stating that yes, that half of a city was abandoned because of lack of infrastructures.
You know, there is a thing called Civil Engineering that comprises reservoir building, and there other things called desalination plants, and there was time to prepare a division. HK also, probably earnt HM Government a pretty shilling or two, and not all of them because the export of opium.
Probably, the average HKer would have received UK citizenship with more advantage than most UK residents originating from the Indian subcontinent, Mayor of London included.
Where you going to put them? Hong Kong is already built on, and the bits that arent are small mountains. None of these are great options for reservoirs. Also, Britain in 1984 was broke. Where was all this money for investing in a colony going to come from, when we could barely invest in the rest of Britain?
You only have to look at the wiki entry to see the reason why.
As the expiry date of the lease neared in the 1980s, talks between the United Kingdom and the People's Republic of China led to the signing of the Sino-British Joint Declaration (1984), in which the whole of Hong Kong would be returned, instead of only the New Territories. This is because Hong Kong's shipping ports, reservoirs and other vital installations were all in the New Territories. Had only the New Territories been returned to China, it would also have been difficult to accommodate those New Territories residents moving to the Kowloon Peninsula and Hong Kong Island.
So you end up with a colony without water or ports. It makes the Northern Ireland Brexit problem look straightforward.