Hi homer2012,
welcome to Questions & Answers..
You either need to purchase the Sony UWA-BR100 wifi dongle..
or
if your Virgin wireless router is close to your bravia then you could connect using an ethernet cable..
or
Use a set of homeplugs, something like the TP-Link HomePlug AV Ethernet Adapter Starter Kit, allows you to share data between your router & the device which is connected to the other homeplug via your home's existing AC power sockets..