What Is Your Nurseries Policy on Toilet Training?

My 2.5 year old DD ihas been attending a reputable nursey here 4 mornings a week since September.One of the questions I asked when joining the nursery was what their policy on toilet training was and was told that they would support the method that the parent was useing and work alongside.
My dd has been familiar with the potty for a while now and uses it when she is at home to do a wee only (had an issue with pooing on it)whenever she is naked or pull up free.However if she has pullups on she rarely asked to go.
DD was off nursery for a week before half term so I decided to make the commitment as I know she is physically capeable and use the 2 weeks to toilet train.Everything has been going really well -Only one accident on the first and second day and none since,she even has her daytime nap with just knickers on and so far all ok.We stayed home for the first 2 days but have since been in the car and out and about in malls-all accident free.She has graduated from the potty to the toilet and again all seems ok.
Before we started it we bought a potty book together which discussed throwing nappies in the bin and me her an DH threw her nappies away.
So today I spoke to one of the nursery admin staff about another matt er and told her that dd would be returning to nursery and that she is now toilet trained to which she told me'the first time that she has an accident she will be put straight back into pull-ups as we have to be careful with hygiene'.I just replied Ermmmmmmmmm okk.But really it's not ok with me that the first time she should have an accident that she will be put straight into pullups-this was not the approach that I was led to believe that the nursery would take and it goes against everything that I have read.
Sorry for the long post but would be interested to know what other mums think and also the experiences that you have had with nurseries here although I love the nursery and DD is really happy there I feel that I may move her.
TIA for replies x