More like the problem was subbing it out to companies that couldn't load data into SGSS, companies that said 'oh you can't accept xlsx files well we'll send it as xls instead then - even though that had a ~1400 cases limit
Anyone anyone running an enterprise that uses Excel for such a critical function wants what's left of their brains tested. Excel is good for quick 'what sees' but it's also the worlds fastest way of creating bug ridden, unverifiable and unmaintainable systems and software
Oh and upgrading to Excel 2019 would be far far more than the licence cost Meister, you have to verify compatibility which takes time and money especially with the decentralised NHS