Wow, Andy T!! I'm off for a nap after reading your itinerary 😐 Here are some suggestions for places to visit near the venue. I presume you are into anything digital, so perhaps you may like to check out V&A Decode Digital Sensations, http://www.vam.ac.uk/microsites/decode Even the website is great. Pink is my fave color at the mo. The V&A is open on Friday until 22:00 and the central courtyard with fountain is a great place to rest and have a drink.
For Friday lunch you could go to Ignite, starts at 12 pm, Giorgi Serci, is performing, at the Royal Albert Hall. It is a cafe/restaurant atmosphere. Always such a magical and special place to visit. http://www.royalalberthall.com/tickets/production.aspx?id=8754
The new £78m Darwin Cocoon centre is now open at the Natural History Museum. It is VERY popular - long queues. Book your free visit online. http://www.nhmshop.co.uk/tickets/events-listing.html
For the not so active I suggest a walk through Kensington Gardens and Hyde Park and pop into the Serpentine Gallery, to see Richard Hamilton exhibition, Free. http://www.serpentinegallery.org/2010/03/richard_hamilton23_february_18.html
Also the Orangery restuarant/cafe, directly behind Kensington Palace, is popular for an elegant breakfast...maybe on Sunday. (Great way to pacify the ladies, just in case you spent all Saturday evening talking all things B&O 😁 http://www.hrp.org.uk/KensingtonPalace/CafesAndRestaurants.aspx
As I am chilling out watching a HD Blu-ray of Jeff Beck (absolutely brilliant) performing live at Ronnie Scott's (Currently setting up a home cinema, surround sound system and can't get the right kit to test it properly in Latvia) I'm tempted to suggest Jazz and Sunday lunch at Ronnie Scott's from 10GBP http://www.ronniescotts.co.uk/performances/view/258-sunday-jazz-lunch
For the clubbers there are a few nightclubs nearby also. One in Kensington High Street, just around the corner from Kensington Roof Gardens, walking east, two minutes. There is also Opal Champagne Lounge, at 36 Gloucester Road, South Kensington. I'm not sure if I will make it back to London for Saturday. First guests arriving at my LuxLoft, Liepaja this week-end and still trying to figure out what plugs into what. I'd post a picture, but as its not B&O you won't be interested. Best, Judith
PS Harrison's time piece sounds fascinating. I must check it out.