Unfortunatly as you say the country has pointed way to far in the direction of health and safety and is this day and age of liabilty problems that is mainly the reason we do not like to offer out to much information on these sort of issues,
Especially as for us guys to have access to further stuff this site does have a record of our registration numbers.
To be honest going from what you originally posted i would suggest that prv's generalyy dont start dripping for no reason at all and would advise you get someone to investigate the initial cause of this.
What advice i would give you is that the prv replacement shouldn't take anymore than 30 mins and dependent on travel distance for your local engineer you would be looking at a maximum 2hours (shouldn't even be that) so it wouldn't be an awfull high cost to have it checked properly and let someone else worry if they mess it up.
Especially as for us guys to have access to further stuff this site does have a record of our registration numbers.
To be honest going from what you originally posted i would suggest that prv's generalyy dont start dripping for no reason at all and would advise you get someone to investigate the initial cause of this.
What advice i would give you is that the prv replacement shouldn't take anymore than 30 mins and dependent on travel distance for your local engineer you would be looking at a maximum 2hours (shouldn't even be that) so it wouldn't be an awfull high cost to have it checked properly and let someone else worry if they mess it up.