[MENTION=325456]checoles[/MENTION] - I drive into work once a week, and take in a change bag with 4 or 5 sets of clothes (depending whether I'm doing a Saturday), a couple of towels, and a pair of shoes. Fold your shirts straight after they're ironed and they'll be fine.

When I ride in I get in early - it's a win win as I miss the worst of the traffic and have plenty of time for a wash and a coffee. Have a shower before you leave home and a good wash down using a sink (put some shower gel in your change bag) followed by a dash of deoderant will keep you fresh.

Keep a plastic bag to put the dirty clothes in and keep them separate from the clean ones, and take it home when you bring the fresh in.

If it rains (and it does in Somerset, as much as in Yorkshire) I've got a hanging space out of the way I can sling my riding gear over to dry. If you can't do this just add a spare set of shorts / jersey to your change bag, but do take the wet ones home at the end of the day - they will start to smell very quickly. My commute's about 12 miles each way so if it looks like rain I've got a light rain jacket that'll go in a back pocket.