British Prime Minister Boris Johnson warns that while getting a trade deal with the United State won't be "plain sailing" because of barriers to British goods in American markets.

Speaking Saturday as he flew to France for the Group of Seven meeting, Johnson cited beef and lamb, pillows and tape measures as some of the British goods that struggle in U.S. markets for bureaucratic reasons.

Johnson says that pork pies, for example, "are currently unable to enter the U.S. market because of, I don't know, some sort of Food and Drug Administration restriction."

The prime minister says he raised the issue with U.S. President Donald Trump during a phone call on the eve of the summit. Johnson and Trump are to meet Sunday.

Johnson says some sectors of the UK economy, such as the National Health Service, would remain completely off limits as far as any trade deal with America goes.