You are correct.
Even if your solicitor hadn't removed clauses 19.1 and 60.1(19) it is likely / probable that Contractors entering into contracts after the Coronavirus outbreak would find it hard to trigger these clauses as they'd struggle to argue that the outbreak and it's consequences had 'such a small chance of occurring that it would have been unreasonable to have allowed for it".
Personally I'm not sure I'd tender for a project on this basis, you're asking your supply chain to price a risk that is extremely difficult to quantify at the moment. That's a different argument though, for now you should clarify with your tenderers that they should price the risk accordingly and see what effect this has on your tender returns (e.g. increased prices / loss of interest).
Even if your solicitor hadn't removed clauses 19.1 and 60.1(19) it is likely / probable that Contractors entering into contracts after the Coronavirus outbreak would find it hard to trigger these clauses as they'd struggle to argue that the outbreak and it's consequences had 'such a small chance of occurring that it would have been unreasonable to have allowed for it".
Personally I'm not sure I'd tender for a project on this basis, you're asking your supply chain to price a risk that is extremely difficult to quantify at the moment. That's a different argument though, for now you should clarify with your tenderers that they should price the risk accordingly and see what effect this has on your tender returns (e.g. increased prices / loss of interest).