Hi and welcome to the site.
The LGW/MAN a/c are not being fitted with a new UCS when they have their refits this year. Instead the current UCS will get a 'deep clean' and be reinstalled on the a/c. Details of the LGW refits can be found in
this thread.
There is a new UCS that Virgin haven't unveiled yet, it is being installed on the LHR fleet only, and this year only on the new A333 a/c that are entering the fleet throughout the year. The rest of the LHR fleet will be upgraded over the next 3 years.
Thanks,
Neil