The Scotch Malt Whisky Society has a Open Tasting Monday September 5th 6:30 to 8:30 in their London Members Rooms, it costs £25 for 5 Society malts from the Autumn bottling list, the staff will help you choose. You can also carry on sampling from the bar!
They also have two other tastings September 12th and the 19th. You can book online at http://www.smws.com
or telephone 0131 555 2929 and remember to specify the London venue.
The also have numerous other events around the country in the next few months.