If you're looking for a new Mef job in London, there is a rather small selection of 3 that you can browse on Jobspotting. Inter-Process Communication and Internet Protocols jobs as the main columns will yield many vacancies to those at the moment seeking a new challenge. Are you up-to-date with qualifications like Wcf, Mvvm, or NHibernate? They're in demand in this area.
At this time, businesses are showing an inclination for more mature applicants. Startups are few and far between when it comes to businesses employing for Mef. Personnel agencies are trained to find the best applicants for a given position. Most companies in this area trust hiring to them. At Jobspotting, you only see what you want to. Feel free to filter out recruitment agencies. Why not have a look at vacancies in another country to compare and contrast opportunities. Just use the Explore tab.