Not necessarily, if there is enough space for a dry-lining one.you still use metal boxes to breeze block.
Quite possible but I, for one, cannot be sure from the photo.dry lined boxes would be too deep
If there were a metal box there (for the socket), one has to wonder why an electrician would remove it when the socket was removed, with the intention (one assumes) of substituting a blank plate (which would simply be making 'unnecessary work'!)!
Kind Regards, John
