Danish rules say the same. Ref.:
"GEN 1.7 Differences from ICAO
Standards, Recommended
Practices and Procedures
Para 16.1.1. Wake Turbulence Spacing.
Boeing 757
In addition to Doc 4444 Part V item 16.1.1 the
Danish rules of the air contains the following provision:
Boeing 757 is categorized as a Wake Turbulence
category Medium aircraft. However, operational
experience indicates that the Boeing757 creates
more severe vortices than originally expected.
Consequently, Danish ATC-units will apply separation
to aircraft following or passing behind a
Boeing 757 as if the Boeing 757 was categorized
Heavy.
Issuing Wake Turbulence cautions to aircraft following
or passing behind a Boeing 757 ATS will
indicate that the preceding aircraft is a Boeing
757."