A one-off Blue Badge walk this weekend will use expert knowledge and 21st Century technology to bring bygone London to life. If you're looking for the perfect prelude to your Open House weekend, head along to Westminster for 10am on Saturday, meeting opposite the Tube station beneath the Clock Tower. From here, a tour guide will lead participants on a 2-hour jaunt around historic Westminster, highlighting ancient remains and hidden architectures. At the same time, the Time Travel Explorer mobile app will be used to visualise how the street patterns in this area have changed over the past 250 years. If you have an iPhone, you might want to pre-load the application to get the full experience. If not, one of the guides will have an iPad copy to bring the past to life. Sign up here. Disclosure - although we genuinely recommend this event as something fun to do on a Saturday, it should be noted that the post's author is a contributor to the TTX blog
