Boliden - green copper to the world

Should I buy Boliden for a book-entry account or an equity savings account?

I know that in an equity savings account, a significant portion of the tax benefit is lost because you don’t get a withholding tax credit, but I’m thinking more about situations like last year’s split + redemption scheme, which cause an annoying amount of hassle without a tax wrapper. Have there been these types of events often, and are they to be expected in the future as well?