We will still be fighting wars in Syria/Afghanistan/ outlying Iraq. Low deaths from terrorism will still be happening.
The major cities in Britain will continue gentrifying, more starbuckification. More restaurants, fewer actual shops, more bars and coffee shops. Even more clean, tidy, safe as it is now.
It's very clean tidy and safe now compared to the late 80's - I can't see much difference between 2000 and 2015 - too small an era.
WiFi everywhere - you will automatically be connected to 4/5G - and you will have to pay to block adds from the wi fi providers.
If the gap between rich and poor continues to widen (the middle class isn't going anywhere but it may shrink slightly) then we will see more social problems.
This will lead to an increase in money being spent on security systems like bars for the windows/steel doors - the vast majority of ground floor flats you see at the moment don't have them so that could be a growing area for the economy.
The birth rate will continue to fall. Our needs for employable adults met by the immigration we need.
As an island we have easier borders to defend than mainland Europe. We may start to do that. We barely police the seas around Britain, another area of possible growth in employment and for the economy.
The Channel Tunnel will be much better policed. It's very British at the moment - we've not moved on far from a handshake, a cup of tea, and 'gosh that looks like a long walk'
. If it needs to be policed it will be. Ditto the ferries and freight.
I disagree with losing police officers, they keep cutting the numbers. I suspect that whichever govt is in place in 15 years will recruit more as the perception of more crime will rise.
We will be on the verge of assisted suicide by then (like Dignitas) in Britain. The nhs will continue to improve in some areas (like it has) and get worse in others - it's a massive entity.