Is the MSCI World IMI ETF tradeable for UK investors anywhere?

Hi there,

I am wondering if the IMI ETFs are a fairly new thing since they are hard to find.

Ie. MSCI World IMI or even other IMI ETFs seem to be rare. To clarify IMI means Investable Market Index which captures large, mid and small cap representation across 23 developed Markets countries in the case of the World IMI.

It basically is an even bigger diversification on normal MSCI or World ETFs since they include small caps which usually have the most growth potential.

My question is there another way of not leaving global small caps out of the portfolio?
Are there incentives adding IMI ETFs to freetrade or a global small cap ETF?