OK. lets go with the full Monty on satellite.
Firstly, since the UK footprint was reduced in size for the same transmitted power from the bird, you should be able to get coverages anywhere in the UK and RoI with a standard Zone 1 Sky dish which is the equivalent of an ovoid dish of around 43cm. The Zone 2 dish is pretty much the same size but the equivalent of a 55cm ovoid dish.
I would suggest buying a 60cm or 65cm ovoid dish which are readily available with LNB at reasonable prices. It is u-bolt mounted and I would replace the nuts on the u-bolts with wing nuts which makes life significantly easier when it comes to alignment. Most 60cm dishes use 5mm u-bolts. (The LNB (low noise block) is the bit at the end of the arm to which you connect your cable.)
To mount the dish I bought (in France) a telescopic worklight tripod without the lights - cost me about £11. I also got three suitable pegs to go over the feet given that the dish will tend to pull the tripod in one direction and to stop the tripod blowing over.
You need to get a 25m reel of xF100 cable (where x is another letter - N is a good one), a pack of 10 F-type plugs, and a similar bag of F-type 'barrels' to link pairs of plugs together. The cable should have a copper foil screen between the insulation around the centre core and the copper outer braid. DO NOT buy cable that has aluminium screening foil as these tend to oxidise if it gets damp. You will pay considerably less if you buy it from Toolstation or Screwfix rather than a DIY shed. You could make two cables, one of 10m and another of 15m so that you don't use a longer cable (and thus loose signal) than you need.
Finally, if you have an Android phone download Satellite Director which you can use to find the satellite direction (about 144deg in the UK - mag and true are about the same at the moment), and then you can use it with the phone camera to ensure the satellite will not be blocked by trees etc.
If you want to look at the coverage pattern go to lyngsat.com and look for the plot of the Astra 28F or G sat.