The Money
In T1 the money is already dirty, and not very much anyway; it is not missed. But the ending of T2 leaves a massive plot hole. What happened after the end about the missing £100K EU grant. We know it was stolen by Veronika, but wasn't it missed? If I was handing out grants like this I would want to see the results. Were there no commissioners coming around for an artisinal pint?
If Renton and Sickboy reported the fraud, where they not believed? It might not be possible to prove their signatures were forged but Veronika skipping town could be. She would have had a mobile phone contract and other documentation that she was in the country. And Bulgaria is still in the EU, its not like she went to Nigeria. The money transfer happened, no body asked why?