I am just thinking...what if you modelled behaviour using a favourite toy...So she can see that pram equals going out and fun. Or could you get her to push a toy stroller around?? Less likely to run off then I would think.

Just thinking out loud (or on the page) so I hope you find a solution soon.
You've made some great suggestions Arcadia thank you!! BUT yep we've tried that...... !!! DD has a toy stroller that she LOVES pushing around with her dolls and teddies in it...... does it all the time!! I could bring the stroller with me out to the shops (her toy one) but I'm pretty sure it wouldn't be long before she was distracted by something else and took off the opposite direction!!! LOL I just think she is much safer in a stroller, ergo or trolley She's just a little houdini..... my little explorer who won't sit still!!!!