As they've said, jump straight in, the more the merrier, in fact looking at a few people's scores you could catch them even though you're 11 round behind
The scoring system is as follows:
5 points for correct winning team
5 points for exact winning margin
3 points for being within 4 or less of correct score
1 points for being within 8 or less of correct score
1 point for correctly tipping the team leading at half time.
Lancaster Road I see, that's handy, just nip round with a case of Guinness and you'll be top of the table before you know it