Hi,
We are also in the South East, in Hertfordshire.
There is plenty of work. Yellow Pages is only a small piece of the pie. Over time your marketing will encorporate many different areas. Yellow Pages always looks daunting, Yell.Com is another angle on YP that is worth a try (enhanced listings are better).
Work out your target market early on and aim your adverts directly at your chosen area.
Leaflets can also be a good way of getting work, hand delivered by you in the areas where you want to build up recommendation & repeat business.
Try to turn your worry into motivation.
"Worry is interest paid on trouble before it is due"
Monday is a good day to start.
(is the rain hammering down in Slough?)
Regards,
BFN