Yes but that’s not what I think of when it comes to SLAC applicants who often want close relationships with professors. Termtime or even summer research jobs are very unusual in the U.K.
SLACs are also more likely to be test optional, and the UK would be a terrible choice if you don’t love high stakes testing.
Except for their disinterest in competitive sports, UK universities are much more like state flagships and if a student feels they’d be poorly suited to the lack of handholding at say UVA or UCB then they may not be suited to the U.K. either.