Appreciate the addition to my comment. SDRT isn’t something I’ve been considering, and I probably should.
Can’t comment on why Freetrade included BRSC first. But, I think it is sufficiently different enough to iShares MSCI UK Small Cap to be included. At small cap level, I’m thinking there should be more opportunity for active funds to find undervalued companies. Time will tell of that makes the extra cost worth it.
Vote for iShare small cap ETF here (please).