Don't tweeze! They come back so vehemently - and you get worse ingrowing hairs than if you thread / wax. Depending on the type of hair (if it's just thin but dark) you're probably best of bleaching it. If you start tweezing they will become thick, and that won't be an option.
If they are already thick, you are best using Nair or threading. If you don't mind doing it 3-4 times a week, then go for Nair. if you want (painful) but great results, you need to thread it. Most beauty shops will do this for about £5, and you'll need it around once a month.
However, if this is really bothering you, it's worth investing in getting electrolysis - it is the only decent option, and it's permanent. It's only around £10 per session and although you will need to go over a few months (Once a month) to finally get rid of them - it's the best solution.