Accept and import files which begin with the school's DfE number regardless of what the destination chosen is.

When a CTF is created, a destination is chosen; either a school, the LA or the NAA (for statutory returns). Users regularly upload these files to Sonar not understanding that with a filename like 0010115_CTF001LLLL they will not be processed. This leads to frustration for the customer and time lost waiting for a file to import that never will and contacting the support team for assistance. If the destination didn't matter, more files would import first time.