I still don't understand why people are thinking that the 2nd place in the group would be better for England for a place in the final
1) First of all England would have another match at Wembley (Possible with 45k) and less travelling for the whole tournament (Just one match for the quarter-final in Rome) is a advantage against the other teams.
2)
Last 16 Round
Okay you play against France/Portugal/Germany and that will be tough.
Quarter-final
But the opponents here are: Winner Group E (Maybe Spain or maybe Poland/Sweden) or 3rd Group A/B/C/D (England should beat all this teams).
Of course Spain aren't shite but i think England would have more problems against teams like Italy or Belgium.
Semi-final
Winner Group C (Netherlands or Austria) or 3rd Group (D/E/F) or 2nd Group A (Possible Switzerland) or 2nd Group B (Denmark/Russia/Finland).
The other way would be tougher in my opinion.
Last 16 Round: In the other half you play against 2nd Group E (Maybe it is Spain).
Quarter-final: Very likely the winner of Group F.
Semi-final: Very likely then Italy or Belgium.