Plaster options

[Tonythecat]

Hi All hoping someone can give ne some advice/options. So my house is 1930s and my front room plaster is fairly poor. Im wondering what are best options. Ive already knocked one wall back to brick but i have coving, original skirting and picture rails so im not sure what is possible with these in place. Ie do they need removing or can plastering still be done with them in place. Also is dot and dab an option or should I have it done with bonding and skim. Some of the ares are not straight and have slight curves so Im not sure plaster board would be an option. Ive got a couple of guys coming over to have a look but thought id also ask on here as I've had good advice for other issues
Thanks in advance for any replies