Unfortunately you are very limited nowadays
Basically Panacur which was a pour-on so the easiest and best solution was withdrawn - basically due to Derfra's ridiculous charging scheme for licencing products, which as a real shame as it did gastrointestinal round worms and lungworms. You just put it in the shoulders of the pig !
in oral wormers you now have
Flubenol does Ascaris suum (large roundworm) including migrating larvae, Hyostrongylus rubidus (red stomach worm), Oesophagostomum dentatum (nodular worm) and Trichuris suis (whipworm) and Strongyloides ransomi (threadworm - adult). Flubendazole is ovicidal.
Solubenol only does Ascaris suum (large roundworm)
So neither does lungworms.
If you go to injectables, then you have 2 types
Doramectin and Ivermectin both of which do all gastrointestinal round worms, lungworm, lice and mites
Doramectin is sold as Dectomax and is intramuscular, Ivermectin is sold as Noromectin amongst other names and is subcutaneous.
Intra-musular is easier to do as you just shove the needle into a muscle.
We use a product called slapshot to do our worming, which makes it all really easy
http://www.yorkvetsupplies.co.uk/product/slap-shot-flexible-vaccinator/https://www.youtube.com/watch?v=ui4Ot-Ak0C0Of course it would pay to see if you have a problem first - for a tenner you can do a worm count
http://www.suppliesforsmallholders.co.uk/worm-count-kit-p-2242.html