You’re correct,there is nothing about it other than its outline that has any of the characteristics of a foot print.
.
Note that they are saying it's a MILLION years old, so in other words in a million years these prints have been completely devoid of erosion....on a beach...around sand and wind...and a boardwalk...in England, which has ice and snow....
This qualifies for the Al Gore award of hoax of the month.