Bill, you can find more info
http://www.peugeotcentral.co.uk under 307 section. Unfortunately you have to pay to enable search facility. Once registered you have to go page by page and you will find all development regarding dpf cleaning, removal, ECU flashing. Here is example topic:
http://www.peugeotcentral.co.uk/ftop...r=asc&&start=0 you might have to log in to see it. Anyways since my Peugeot days things went much further. Here is company which specializes in DPF Removal
http://www.more-bhp.com/dpf_removal_...er_delete.html . £ 199 to get rid of the filter is kind a value for money, unfortunately Volvo is not listed but I’ll drop them an email to see if they can help. My filter was replaced 3k miles ago but my driving is mostly short city journeys so I guess it won’t take too long before it clogs up.
Mot question
Your car shouldn’t fail if it complies with Euro 4 European emission standards. Reasoning behind it is that Volvo use to make diesels complying with Euro4 with and without filter. Euro5 must have 5 times less particulate matter than Euro 4 and probably will fail it is my guess don’t take it for granted.