Any question answered...

I don't know if you can see this: http://www.sportpursuit.com/sports-lifestyle/ironman-expedition-digital-chronograph

But it's £18 and this: http://global.timex.com/watches/expedition-chrono-alarm-timer-t496619j
http://global.timex.com/sites/default/files/imagecache/product/T49661_2.jpg

Or else this:
http://www.ebay.co.uk/itm/Timex-Ironman-Watch-Digital-10-Lap-Memory-Chronograph-Black-Resin-Strap-T5K607SU-/121064634823?_trksid=p3284.m263&_trkparms=algo%3DSIC%26its%3DI%26itu%3DMRU-281%252BUCI%252BIA%252BUA%252BFICS%252BUFI%26otn%3D21%26pmod%3D220951057050%26ps%3D54http://rover.ebay.com/roverimp/1/710-53481-19255-0/1?ff3=2&pub=5574889051&toolid=10001&campid=5336525415&item=121064634823&mpt=639752

?

Not sure the expedition ones have the interval training timer. The Ebay one only has a 10 lap memory. Are you using it for running? Mine has a 100 lap memory. Once you start using the memory, you fill it pretty quickly.

30 is a nice minimum.
http://burasi.co.uk/index.php?i=B000JNJLXA

I'm also a fan of velcro straps. Hate having a watch too tight or too loose when running.
http://compare.ebay.co.uk/like/271141296455?var=lv&ltyp=AllFixedPriceItemTypes&var=sbar&cbt=y