Imported raw materials that are used by British manufacturers too. Many people overlook that although something is manufactured in the U.K., the raw materials to make it are imported.
The fact is that the UK has a large negative trade imbalance with the rest of the world. With the fall against the dollar and, to some extent, the euro, the importation of inflation is unavoidable. That trade imbalance will not disappear any time soon.
Prices will rise!...that will cause political problems for May and the Brexiteers.
Raw material costs will increase, but raw materials generally make up a small part of the cost of manufactured goods. The example I quoted earlier about the midlands packaging company winning a contract from the Chinese, they import recycled plastic from Germany and have had a 15% increase in raw materials since Brexit and still can beat the Chinese on price because of the fall in the pound. WTF we can't recycle our own plastic in this country god knows.
The trade imbalance will only dissappear when British industry gets it's rear end in gear. The biggest cost in this world is the transportation of finished goods from one
country to another, the second biggest cost is labour. We are not land-locked and nowhere in the UK is far from a port, so we have an advantage over many. Now labour costs have signficantly reduced we have no excuses.
Yes we will have inflation, but the magnitude of this inflation will be controlled by how British industry reacts to the situation. And a little inflation is not a bad thing, many economies in this world have been stagnant for far too long. That's why the Bank of England set their Target as 2% not 0%.
As for political problems for May and Co, providing the Labour Party continue on the self-destruct psudo-communist Corbyn path, whatever the Tories do it is almost certain that they will win the next election. Even most of the Labourites admit that they are un-electable.
