The pw5 refers to the fire front model. It sounds like you have a Bermuda electronic back boiler. If it is struggling to light then it is not diyable. The pilot system on these are sometimes troublesome if the boiler has not been serviced regularly.
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local