Pairs trade - spy/iwm (or similar) from Europe / UK

Has anyone outside of the us specifically UK or Europe done a trade like this? Not sure what is the best method to get it done considering I can’t just buy / short sell the etfs directly and need to either use options or get entry positions using options selling itm etc. Purpose of the trade is two fold 1 provide a slight hedge incase of a downturn and 2 capture what I am expecting of increasing returns to scale simply put big cap outperforming small cap.