how much of a difference in a month?

[nearlyfinisheduni]

how much of a difference can you make in a month with regards to both weightloss and dress size?

Depends on what the starting point is in terms of weight and size. The more you have to loose, potentially the more you will loose in a month, but do it sensibly or it will all pile back on and more. If you seriously watch what you eat, write it all down and exercise 4 to 5 times a week, then you should loose a minimum of half a stone to 10lbs, where 10lbs is roughly said to be equivalent of a dress size for most people ( I saw most as it various with shape and where the weight initially comes off ). Hope that helps.

starting weight just under 13 stone (yuk!)

If you really want to go down a dress size then do the jillian Michaels DVD. Ripped in 30 or 30 day shred.
I guarantee you will lose inches!