The Guardian has another article arguing that the WTO option isn't the saviour it is cracked up to be. That Weatherspoons chappie and Rees Bogg both see it as better than the EU. The former thinks we will once again be 'the champions of free trade'.

https://www.theguardian.com/commentisfree/2018/dec/19/wto-brexit-trade-uk-economy

The article questions the equation of 'British' and 'Free Trade'.

And quite rightly, we didn't obtain an empire by paying respect to the free trading choices of others.

The article also explains that all the states which are members of it also have 'side agreements' for trading, as not all of them actually agree with the abolition of all trade tariffs. We could of course put Trump on this list.

Looking to the EU, where so many British businesses trade, does this mean we could get round EU tariffs on our goods by joining or becoming more active in the EU?

But the WTO isn't part of Farage's arguments, he thinks we will be more 'competitive' against EU countries when we have left. Not sure why this should be.