Paypal has stopped working again, (same as tzga6). I have changed nothing with paypal. It tells me "We can’t find this account at your bank" Re-adding as new does same.

No mixed currency, in fact all transactions are all GBP. 
I know from previous workings with Paypal that they do often change the formatting and naming scheme in their api and downloads.  But in saying that none of my accounts are updating anymore.