Meanwhile, New Zealand needed to take note of two important points concerning Brexit, according to Petersen.
"The split of the tariff quotas has gone ahead. We've certainly disagreed with that process and with the methodology that they've used to do that and we'll continue to agitate about that at the World Trade Organisation in particular and directly with the UK and the EU."
Listen below:
"The second point is really important. We are still negotiating with Europe around a new trade agreement and we're also in the process of negotiating a new trade agreement with the UK. So it's very important now that we get those talks back on track."
Europe and the UK could engage with New Zealand and put a meaningful access offer on the table for agricultural goods, Petersen said.
"So we need to get that up and running as quickly as possible."
Petersen said he found it interesting that UK exporters were starting to find it difficult to get their goods to Europe.
"We could have told them that a long time ago."
Also in today's interview: Petersen said the three recent farm deaths in New Zealand, was "a very tragic reminder of the need for safety and just stopping and thinking and looking where we're going on farm at the moment."