There is a page specifically dealing with your situation though from the Dutch Embassy in the UK:
A Dutch passport or identity card can only be issued to a Dutch national. You can find more information on the ways in which a person can acquire Dutch nationality under current Dutch nationality law on the Dutch government's website.
Nationality issues can be quite complex, especially those where one of the (great)grandparents was the Dutch national. The Embassy is not in a position to undertake nationality investigations as these can be very time-consuming. You may wish to contact a solicitor in the Netherlands who specializes in nationality law to obtain his/her opinion on your nationality status.
If you have all the necessary documents to show that you acquired Dutch nationality through your Dutch (grand)father or Dutch mother, then please read the information on this website with respect to a first time passport application.
If you are not a Dutch national yet but think that you are eligible to apply for Dutch nationality and you are living in the UK, then please read the information on the page 'Applying for Dutch nationality' before contacting the embassy.
You can look at the Dutch Government site for more information but as the embassy site suggests you should find a solicitor specializing in the citizenship cases and contact them for more help.