I'd expect most large organisations have started looking into the consequences of Brexit and SMEs are starting to follow suit.
The SME company I work for buy a colossal amount of goods from the UK but will soon be undertaking an extensive review of our supply chain and will be exploring alternatives from other EU countries. We were ready to sign up to a long-term service contract with a UK company, but given the current state of play there's a reluctance there to pay the money and sign on the dotted line.
It's hard to plan with such huge unknowns so the worst case scenario of a no deal hard Brexit has to be considered. Would a weaker Sterling compensate for any tariffs introduced? Would the bureaucracy and delays make it unattractive to buy from the UK compared to other EU countries?