how to prepare wall in shower area

[nhendersontile]

hi, i hope someone can help. i have an existing recessed shower area where we have taken down tiles etc and fitted new shower traty. however one wall (on the right as looking at pic) is totally uneven. i started levelling with bonding but then read that its not a good idea if going to tile after. i cant board as its too uneven and the walls (crumbly breeze block) wont hold screws well. am i ok to fit a bead at front edge (thinking of using one of those rendering larger ones) and levelling off with wickes one coat patching plaster. then leave for couple of weeks before tiling? also do i fit beading with the plaster or use plsater adhesive?
ive plastered a few times before so comfortable doing it but just want to know its the correct thing. also the gap i am filling out is about 20mm and the tiles are the ceramic 60x 30 ones)

any help much appreciatedx and ave added (pic here hi,

any help much appreciatedx and ave added pic here - flyingkiwi.com/contact-fo...1651%20(1).jpg
thanks
nei
l

 

[DHTiling]

Use the attachment feature to upload a pic..

 

[nhendersontile]

hopefully this works

 

[Marksmithtiling]

Can you dot and dab plaster board then tank it ??

 

[White Room]

As above, that would takeout any uneveness on the walls..

 

[nhendersontile]

afraid walls are too uneven to dot and dabb - wwanted best plastetrng solution if possible

 

[White Room]

How uneven, I've dry linned walls that have been really bad....

 

[Marksmithtiling]

As above gets over a multitude of sins..

 

[kilty55]

as above dot and dab it

 

[nhendersontile]

thanks for the suggestions guys. i am afraid as the wall "bulges" ive offered up the plasterboard but it ends up with enormous gap at top or bottom + dont have heaps of room to dot and dab so would rather "fill out" to furthest point. WIth that in mind what is the best plastering product to do this with?
thans
neil

 

[Marksmithtiling]

Take out the high spots ?? Hammer and bolster?

 

[nhendersontile]

thanks for this and sorry to sound awkward but problem with this is its just one skin of cumbly breeze blocks - tried chipping and half block fell away and have stuff attached on other side!