Palaeontologist Dean Lomax said discoveries like this were "exciting" and "quite uncommon".
Mr Lomax, who is a visiting scientist at The University of Manchester, said it was "exciting" the bones were discovered during roadworks.
"What I would really like to know is how much of each animal has been found," he said.
"Woolly mammoth and woolly rhino were once a common part of the wildlife here in the UK but recent discoveries like this are quite uncommon.
"It would be interesting to know whether this is a one-off discovery or whether more individuals are preserved in the same area."