If you require holes or a cut-out in a specific place, i.e. a hole for a parasol, order the made to measure glass top as usual then use the customer notes section on the "Confirm Order" page (1st page of the checkout process) where you can attach a drawing of your requirements.
Mirrors and Glass Surface Protector

Transparent Polymer Coating.
Water and stain repellant.
Protects Glass, Mirror and many other surfaces,A must when ordering shower screens and shower doors especially sandblasted doors and screens
475ml bottle.
Price : £17.16
(including V.A.T.)
Suction Cup Lifters

Twin Suction Cup Lifters. perfect for positioning large mirrors, glass shower screens and glass shower doors.
Weight Capacity 70kg.
Guaranteed forever register online.
Price : £14.40
(including V.A.T.)
Furniture Protector Pads (set of 18)

Clear plastic, self-adhesive Wooden furniture protector pads (set of 18).
Price : £3.50
(including V.A.T.)