hello Ewe, I am new to mumsnet and don't know the abbreviations so bear with me.
I live in Tadworth and this is what I have found for my two year old although older children attend as well:
Diddi Dance - pre-school dance classes. Nork Community Centre, BAnstead, two classes, 1pm & 2pm. I found this by accident this week and had free trial. My daughter soon joined in. It is £5.00 for 45mins but well worth it. They do other areas, tel: 07873634292 and ask for Jo.I liked it because you can pay per session, some other groups want a month's or term money.
A surestart family centre - Epsom Downs Primary School, St Leonard's Road, Epsom Downs. Tel: 01737 851079/354313. They have events on all week. We go to "staY & play" which is on Tues 1.oo-3.00pm, Wed 9.30am - 11.30am, Friday 1.00-3.00pm. but they lots of other activities going on too.
Banstead Sure Start, Banstead Youth Centre, The Horseshoe, Banstead. Toddler Group on Tues 9.30-11.30am term time only, £2.00 per family. Wed Storytime 11.am-12pm. term time only. Also has other activities during the week.
hope this helps.