Complex sentence: The £2 million of the ECSC loan were actually deposited in the Northern Trust Bank as collateral for the loan guarantee, a fact unknown to the WDA and the company investors at the time.
Split into simpler sentences: The £2 million of the ECSC loan were actually deposited in the Northern Trust Bank as collateral for the ECSC loan guarantee. This was unknown to the WDA and the company investors at the time.