Berlin is an amazing city, plenty of history, museums, easy to use public transport and good food and drink. If you want a nice cheap city getaway then this is ideal. You'll fly from London on 19/03 in the early morning and return on 21/03 (three flight times to choose from but if you choose the latest time you'll have a full day exploring Berlin).
I've picked a great central located hotel, the 3* Ivbergs Berlin Messe which is conveniently located and public transport is so easy to use in Berlin you can get around great on the metro.
Flights for 2 book at Ryanair £51.96
Book 2 nights hotel in Berlin at Amoma.com using code AMO1302 £64.80