Hello. I had opted in to earn interest on my uninvested GBP cash in my Trading212 Invest account. Some of that money was placed on a QMMF by Trading212. The QMMF in question is BLACKROCK AM IRELAND LTD (IE) BLACKROCK ICS STERLING LIQUIDITY SEL (GBP) INC, which is domiciled in Ireland.
My understanding is that because this fund is considered a reporting offshore fund and as the income is from overseas, I will now have to register for Self-Assessment 
. Is this correct?
Following that, will Trading212 at the end of the tax year provide a tax certificate that discriminates how much interest was earned from the UK banks for the GBP cash and how much interest was earned from the overseas QMMF? As from my understanding these two amounts should be entered in different places in the Self-Assessment.