Germany to London trip
Even if have Blue Card / Niederlassungerlaubnis / Aufenthaltstitel (residence permit), a visa is required to visit London.
You can get all the information from
You to get an appointment from worldbridge center, visit them on scheduled date to provide bio metrics and submit all documents along with application and passport. Fee of EUR 100 has to be paid. ( 6 months tourist visa with multiple entry). It takes approx 4 weeks for processing and visa+passport is delivered to your address.