A combination of the vast majority being filmed by US companies and the trailers / films themselves being released as "upcoming movies".
The culture in the UK has a long history of desiring to be more like the US because the marketing has been good (perhaps excluding the last years of anarchy there).
The process of cultural osmosis has left us absorbing many Americanisms into our language simply through long term exposure.
A combination of the vast majority being filmed by US companies and the trailers / films themselves being released as "upcoming movies".
The culture in the UK has a long history of desiring to be more like the US because the marketing has been good (perhaps excluding the last years of anarchy there).
The process of cultural osmosis has left us absorbing many Americanisms into our language simply through long term exposure.
