The timbers to support the roof are all in place as are the Dormer window frames.
The roofing felt should be going on in the next few days which will make the building weatherproof. When the roofing tiles go on in the near future the building will be water tight and able to withstand whatever the English weather can throw at it for at least a hundred years.
However this is not the end of the Restoration but rather the end of Part One.