It doesn't have to be on the Sim. I've always done the training on the aircraft and you can visit Gloucester, Coventry (although this may not be the case now) and I believe Dundee for the steep approach training. They can reset the papis.
The aircraft has to be approved (steep approach supplement), the operator and also the pilot.
You can find this info I believe on te LCY website.
Rgds
RR