So I have just entered a 10 miler for 4 weeks time. The furthest I have ever run is 7.5Miles which I do once or twice a week. I generally run 1 speed session 3 miles or so, one tempo 4.5 miles or so as I was working towards a 10k but decided on this instead.

So I guess I need to add a bit more distance to my LSD run to take it to about 10 miles over the next 3 weeks, what else should I do in the time I have left? Add another mile to the temp runs?? I don't want to overdo it

It depends on what you want from the race Dan. If you want to do it in a certain time then i would add Intervals to your training as well as increasing your LSR,

Something like.

4 miles easy pace
5 mile intervals
LSR
Maybe some cross training ?

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Goals for 2010
Sub 27 minute 5k by the end of year, almost there with 27.07
1000 miles run by the end of the year
To beat my current HM PB of 2.16
My justgiving page: http://www.justgiving.com/Lisa-Preston0