depends on where you are in the country and as all have different labour rates
best bet: get a kit from dave at seremotors and use a trusted local specialist or any garage

warrant cannot be voided as using oem parts as needed, just get book stamped.

when i had mine done at 60k was i think 350 inc vat but was 30k ago now
 
I was recently quoted £376 inc vat for a PD130. That's from an independent VAG specialist in sheffield.