Tariffs will be put on agriculture and cars though

The UK says that up to 87% of total imports are to be tariff-free as compared to the current 80%, should a no-deal Brexit materialise. However, the UK will keep a number of tariffs such as those on finished vehicles and on goods such as bananas, raw cane sugar, and some fish to avoid a hit to developing countries with preferential trade deals.

Here's the crux of the announcement:

Tariffs UK