EXTRACTING the first four consecutive numbers and placing them in another cell?

Basically, column C is the tricky one. It comes from the bank and somewhere in there is a 4-digit tenant reference. I did a formula to try and isloate it and it worked on most but if you look at the very first row, there is a spurious 99 in there, so it didn't work. Is there a way of EXTRACTING the first four consecutive numbers and placing them in another cell?
Thanks
Robo