The Chancellor delivered a lot of changes that were relatively favourable to small businesses, but in the background a few important adverse changes were made which seem to be because too much money was leaving the Treasury. This is therefore not a bold post-Brexit Budget. 

If you let out a residential property, you shouldn't underestimate the effects of some important changes to the tax rules.

Tax is like any other cost. It reduces the return you get from your asset. Therefore if your tax cost increases, your return decreases and this may affect your view as to whether your property remains a good investment.