Previously there was no toilet - there was no space for it, so the only solution was to increase the size of the room. This bathroom was enlarged on the expense of reducing the bedroom. To do that we had to install structural steels, as the load bearing wall was removed. Here are the images of how it looks now, how we progressed and what it was before.
As allways, first thing was to rip out everything, remove the load bearing wall. To do that we had to install a steel box frame - as per engineers indications. In our opinion, a lot cheaper option would have been just to support the beam going along the wall above (it was already in place) or to install a T shape supports. But, due to legal requirements to notify neighbours about party wall alterations, the more expensive but quicker solution was a box frame - no need to chase into party walls. Once that was done, sewer pipe was installed, new partition created, altered the flat entry door position and the rest was the common bathroom installation work.
And below are the images of how we progressed: how the bathroom looked before we came and during installation: