Wilred 's coins can be used to demonstrate that Offa 's influence over the East Angles occurred at an earlier date than has previously been supposed .
Are of little use in determining a secure chronology for Beonna 's reign .
Wilred 's coins can be used to demonstrate that Offa 's influence over the East Angles occurred at an earlier date than has previously been supposed , but are of little use in determining a secure chronology for Beonna 's reign .