It looks like there might be a Universal Studios styled themepark in London by Paramount... at some point in the future... as it is being described as having a massive 50 rides, and probably studio sets and backlots, including a shout out to Transformers, as it is one of their current movie icons.
So don't expect it opening up too soon (it is estimated to be open in 5 years time, some time in 2024)... but it's been announced to be back on (apparently it has been stalled in the past), and if it does end up existing, it should be another must-see destination for Transformers fans visiting the UK.