Scandinavian leftovers

It's August 64 AD. Three years earlier 20.000 Roman soldiers were butchered in a bloody revolt against the Roman occupation of Britain. The Romans restored order quickly. This followed by increase and prosperity within the new province. London became the provincial capital and the center of international merchandise. The new Roman roads and new Roman towns made transportation easier, quicker and attractive. It is at this time, that in Northern Europe a big economic recession occurred. Under Roman rule, the economy of the British tribes was initially focused on trading with the Mediterranean, Indian, Southeast Asian and Chinese markets. Suddenly, shocking news arrived in Britain of a terrorist attack on both Rome itself and on Lyon, the Capital of Gaul. Both cities were the target of mass pyromania and hundreds of thousands of people died. The merchant-ambassadors of the far east kingdoms Funan, Mahan, Baekje, Gaya, Jinhan, Silla, Ryuku, Mon, and Kyushu, became worried that this might lead to an end of their position in Britain. They feared that Nero might use this attack as an excuse to close down the Maritime Sino-Roman trade in silk, rice, art and wine. But then, on the advice of a adventurer, their attention turned to Scandinavia. What are they up to?