One chart shows you all the main economic forecasts for Britain in the event of a Brexit

Australian investment bank Macquarie has produced a handy chart so you can easily see all the forecasts from a range of economists, from some of the world's most important organisations, about life after a potential Brexit — a British exit from the European Union.

All but one of the forecasts predict GDP will shrink by 2030, with estimates of the contraction between 0.8% and 7.9%.

Here is the chart:

Macquarie

Macquarie says:

It is hard to know how seriously to take such analysis. The beneficial aspects of trade are one of the most well-understood facts in economics, and although not undisputed it does seem likely less trade would be conducted globally post-Brexit. But there are a multitude of other factors which often do not get included in the analysis – such as immigration, regulation, budgetary savings – which could easily overwhelm the trade impact. Forecasting those is almost impossible given we do not know what future governments, which could be very different in personnel from the current one, will want to do.

The investment bank also has another shorter chart rounding up estimates for the short-term impact of a Brexit, looking at growth by 2020. Here it is (FTA refers to the free trade area and WTO is the World Trade Organization):

MacquarieMacquarie says the process of actually leaving the EU will take at least two years of protracted negotiations and the bank says: "All of this is likely to cause a great deal of uncertainty, and this will have a negative economic impact."

While the consensus appears to be that a Brexit will be bad for Britain's economy, it appears that we are heading for it. The latest figures show "Leave" is 6 points ahead in an Ipsos MORI poll and a Survation poll gives "Leave" a 7-point swing.

Macquarie has also produced this chart showing how the "Remain" camp's lead has melted away over the last few weeks:

Macquarie

NOW WATCH: Movie theater soda is a rip-off — but it's not the highest marked up item out there

See Also:

• Here is what will happen on Friday if Britain votes to remain in the EU

• Morgan Stanley just nailed one of the most ignored impacts of a Brexit

• The pound just broke a new high for 2016

SEE ALSO: NEW BREXIT POLLS: Leave has surged to BIG LEADS in hugely important surveys