If you're set on Wcf jobs in East London, there aren't very many at the moment: we count 2. Have you tried neighbouring regions? Employers are primarily employing .NET Framework candidates, but also C# experts. Professional candidates interested in these positions should familiarise themselves with areas like C#, .Net and ASP.NET.
At this time, companies are showing an inclination for more mature candidates. There aren't currently any startups in the current companies on Jobspotting looking for Wcf expert knowledge. The majority of companies searching for staff at the minute use recruitment companies to locate talent. If such jobs aren't the most appealing for you, feel free to filter your Jobfeed. Use the region map at the top of the page to see where the offices are located.