Saxons in Britain and in northern Germany?

I haven't found anywhere that the had any clear contacts. Bede (Anglo-Saxon) wrote on continental Saxons but he said precisely that they had no relevant political organization: "the old Saxons have no king, but they are governed by several eorldermen (satrapas) who during war cast lots for leadership, but who in time of peace are equal in power" (Wikipedia).

It doesn't seem that British Angl-Saxons helped continental Saxons during the war with the Franks (again no references). This could be because more than two centuries had pased since they broke apart and also because Anglo-Saxons were Christians, while the characteristic of continental Saxons is that they fiercely kept their traditional beliefs.