Owners of the Coylumbridge Hotel in Aviemore, blamed the notice on an 'administrative error'.
A letter was sent to workers at the Coylumbridge Hotel in Aviemore on Thursday.
The collision happened in the Highlands shortly before midnight on Friday.
'Mega hotel' in Glasgow city centre and new site in Princes Street, Edinburgh, among the chain's plans.
Helen Reid had been missing from her home in Aviemore.
Patrick McAlindon dug up the old bombs when he was out testing his metal detector with mum Ana-Marija, during a break in Aviemore.