The API guidelines state that you can only send a batch payment in the currency of your account. E.g. if your account is in GBP, then Batch Payments can only be in GBP, even if you have a multi-currency account like we do.

We'd like to propose allowing Batch Payments if the transaction currency and the bank account currency are the same.

E.g. You have a home currency of GBP, but you can create batch in USD, if the bank account is in USD, and the invoices being paid are also in USD.

Just a suggestion.