Re-plaster needed?

[Doddy33]

Hi,
Refreshing the bathroom in our 1930s detached, removed the tiles and the walls are not in a great shape. Largish cracks in the plaster in exterior wall, ceiling and corner gap.
Do you think I need to take it all off to expose the brick, then board and plaster? or can I get away with filing? If so, what would you recommend using?
I had planned on painting the top half of wall and tiling the bottom half which isn't plaster but these concrete(?) blocks.
Cheers
K

 

[Deleted member 292770]

looks like good ole cement. depends whether it’s blown or not?

 

[Doddy33]

Nope not blown as far as I can tell, just some good cracks

 

[Deleted member 292770]

skim it and tile over.

 

[Doddy33]

Thanks guys, what would you recommend to skim with? Would you also use a mesh? Some of the cracks are pretty deep 40mm+
Cheers