Cheers for the comments
Main Tv wall - Joiner knocked this up today. Very impressive stuff - gave him the tv measurements, bracket measurements etc and he had it all worked out and started asap. it's about 20 cm's deep but with enough room around the tv to allow for ventilation and also the ability to move tv in and out a bit on the bracket etc.
The left and right front speakers are going on the left and right of the tv at the middle height of the tv and the centre speaker just below the tv.
Lots of wiring to be completed yet so the joiner has left the plasterboard on the bottom right fairly loose so that I can remove it and get all the network wiring etc attached and plug sockets/hdmi cables etc in before it gets plaster.
Left side and right side of main wall will be 2 units (about 80cm height) to house the various electronic components, speaker wire for rear speakers showing on the left side, the rest to be input as we go.
Not much more work internally other than plastered which will probably be next week now. External work for the joiner is still to be done including all the wooden boards/fascias etc which will be getting done later this week.
TV bracket arrived - it's bloody heavy
Speakers should arrive tomorrow or thursday/ TV to arrive thursday as well. Various optical cables and HDMI arriving tomorrow. Still need to order Amp and Sub so will get them tomorrow.
Off to IKEA tomorrow for a couple of cabinets for the left and right side so should have them to sort out.