yup they used renault parts, ifyou look on the BB website it even mentions this bit about the warranty thing.
"At BBPT we can take care of your pride and joy in the same manor and in most cases better than the main dealer. Our servicing program follows all Renault official guide lines including diagnostics, vehicle inspection and uses genuine replacement parts at greatly reduced prices.
A recent report by the Sunday Mirror revealed that servicing is allowed outside main dealers and will still valid any manufacturers warranty. Coupled with this it shows the varying prices offered by dealers across the UK. Take a look at the article using the link below.
Sunday Mirror Link"