Anyone over 40 years of age is entitled to one and a half weeks pay for every years' service, therefore your friend would/should receive a minimum of 30 weeks pay. There may be payment in leiu of notice but this may not apply if there is a change of employer, in which case your friend may have to apply for a job with the new contractor.
As previously mentioned, some employers (not many in my experience) may pay more than the state minimum via a tax free lump sum ex gratia payment, or in the absence of this may increase the weekly entitlement, eg, 2 weeks pay for every year of service. One of the best redundancy packages I heard of was a local well known company that paid 6 weeks wages for every year of service, but don't expect that. I'm only giving you an example how companies can soften the blow of job loss.