Followers of http://www.Zwischengas.com may have spotted an Alvis umbrella in the report of St Gallen’s Classic Car Show, but no mention of any Alvis. However your roving reporter saw some and also bumped into several Alvis owners visiting the show in the rain. Inside the hall was an SA Speed 20 and an advert for a Fourteen woody, not seen in the UK for some time. Outside in the rain Rolf Huegli had brought his TD21 four door. 
Have you visited the Fourteen website? It has a new post about Le Mans, click on Fourteen
On the same trip further Alvis related visits are described in Jottings and details of a Graber TC108G are in Cars seeking new custodians
Alvis Archive 
The SA20 10074 is the L.S.Richards Special, VSCC racing history, Pomeroy Trophy winner (Silverstone).