bathroom prob any help please

[hemingway]

just taken old bath out and looking to replace.its a double ended bath so taps in the mid.do i batton both walls the bath is going against for the bath to rest on for add strength.plus whats the best,tile then push the bath up or put the bath up against the wall then tile to the bath and third is the taps where single before and now its a mixer,22mm hot 15mm cold.will this pose a prob when running both together.cold is mains fed an hot is from the combi boiler.bescause the mains will be fed at a higher pressure will their be probs.thanks

 

[hemingway]

Dosent say anything.l have primed anyway..looking for a decent grout for the bathroom does any body recommend 1.

 

[hemingway]

Iv been reading on here an basically tub adesive is a no no really.why is that...iv used a tube adesive already on 1 wall of tiles an it seems o.k, theve adhered well, pretty strong really iv had a real good tug and they are stuck.should I change for the next walls iv plastered.bit worried now.