I think this largely depends on what you plan to invest it in. Are there any parallels between the portfolio SW held for you and what you intend to do with it?
I'm only just starting to pay more attention (hence the SIPP and transfer) but I think that SW was quite reliant on property which was doing badly. Very roughly, in the last 9 months the SW return was 6% and Vanguard was 12%.
I think this largely depends on what you plan to invest it in. Are there any parallels between the portfolio SW held for you and what you intend to do with it?