If you don't put in a huge amount of analysis work at home, you're liable to swing and miss.
[Policy that's a primary impediment to trade in something]
+ [Policy they're willing to remove]
+ [Price you're willing to pay]
For example, the pies don't have much of a shelf-life, making trans-Atlantic trade in them expensive (air freight only).
The US probably have one or two requests of their own...
However, as @snlester, @scottlincicome and @CatoTrade will tell you, the Jones Act is no easy prey.
However, finding them is a difficult and technical exercise in forensic business analysis. The UK will need to think harder than pies and ships.