I recently had a new TV put in my bedroom which is serviced by a separate aerial than the one in the sitting room which is part of a package with broadband, telephone and TV.
How do I go about getting more channels on this new one?
At the moment I can only get 1-5 plus a couple of others and radio stations.
There is also a very basic digi box attached as well.

Any help would be very much appreciated..

Was there any reason why you installed a separate aerial? A single aerial with suitable distribution system is perfectly capable of feeding multiple TVs so there should be no need for a separate aerial unless you want to receive a completely different transmitter to the other aerial.

Anyway. From the sound of it I suspect the new aerial is pointing at a relay transmitter which is only broadcasting three of the six main muxes. This will give you the main BBC channels, ITV, C4, C5 and a few others plus (if you have a suitable TV/box) the main HD channels.

If that is the case then the only option would be to point the aerial at a main transmitter if possible or, if the main aerial is pointing at a main transmitter, take a split of the main aerial.

Whilst not 100% accurate if the aerial is mounted with the elements vertical it is pointing at a relay transmitter. If horizontal it is pointing at a main transmitter.

It's a myth that each tv or room needs its own aerial. Also a myth that if the primary aerial was part of some sort of package or bundle it is some how limited to only that service on a single tv. Not a new myth, it goes back to the analogue days. Round here, many homes have 2 or more aerials on the roof all pointing to the same mast, again the people would have been told or led to believe from someone or a company that they needed a separate aerial for each room. I bet they make more money out of people that way.
U only need 1 good aerial, with multiway booster box (or passive splitter if the ambient signal where u live is strong enough), and some cables to each room.

As u can see I am a bit of a stickler for this, because our skyline is blighted by lines of multiple aerials, all but 1 not required, but also good honest people being ripped off to getting this extra stuff which costs more than a simple booster box or even unpowered splitter.

Is it possible the first "aerial" is Virgin Media?

That would make some sort of sense. You'd think that any second aerial would be pointed at the same place as the first. So would pick up the same range of channels, all things being equal.

I'm with TalkTalk.. looks like I could have save myself £90 then!

What exactly can I do now then? I suppose getting a Tv technician in is the only thing?

Poke your post code into the checker on the right of this page

http://www.digitaluk.co.uk/

Tick the Detailed View box then click OK. It will then tell you the most likely transmitter you can receive. If it shows a main transmitter site with the full range of muxes as a possibility (green bars under the numbers) then you might stand a chance of getting some extra channels. But if it only suggests a relay with three muxes then you may have to accept that is all you can get.

But a reputable local installer should be able to give you a better indication based on local knowledge. The postcode checker is not infallible so may not give a totally accurate prediction.

Thanks very much.