It's been a week of change in Birmingham – having seen our train station go from a regional embarrassment to a national treasure.

The shiny new images of the new Birmingham New Street contrast with the 1960s monstrosity we have come to know.

So it seemed an appropriate time for the last in our series of Birmingham Post blended images, which merge pictures of parts of the city with the equivalent shot from years gone by.

The process is simple – using digital-imaging technology we blend together two pictures.

The results are a step back in time – highlighting the changing face of the city.

It is the fourth in our series of blended images. The first included pictures from Corporation Street, Kings Heath and Solihull , the second took us to Sparkbrook, Northfield and Acocks Green , and the third included images from Chamberlain Square, Five Ways and Yardley .

The latest batch takes us to Needless Alley, Colmore Row and Sutton Coldfield, using some pictures taken more than 100 years ago.

Nostalgia related to Birmingham in days gone by has never been more prominent, with successes like local website Brumpic and the Nicklin Unseen images taken in the 1950s and 1960s recently published in the Post .