Excellent news. Would be nice to see a little more competition and variation in routes available through the tunnel.
Indeed ... London to Frankfurt, and perhaps beyond ... London, Ashford, Calais, Brussels, Liege, Aachen, Koln, Frankfurt, Wurtzburg, Nuremburg and Munich.
Certainly in our business I'm often surprised how much work with do with Germany (and how little with France by comparison), and city centre to city centre through services leaving in the morning and at lunchtime to some of the key cities would be very attractive indeed.