The two marques announced late last week that they have linked up for a new 'works' partnership that will see Honda supply turbo V6 engines to McLaren from 2015.
"Honda will develop its engines at its facility in Tochigi, Japan, where it has already begun development," read the media statement last Thursday.
But Germany's Auto Motor und Sport said Honda is also looking to operate out of an English headquarters.
"Rumors refer to Cosworth's properties," said correspondent Michael Schmidt.
Cosworth, currently the supplier of V8 engines to Marussia, is expected to pull out of formula one before the change of regulations for 2014.