The FIA has moved to ease concerns after last minute repairs were required for the Marina Bay circuit on Friday night.

Ahead of the opening practice session, during the support programme, a number of kerbs had worked loose, prompting a delay which subsequently led to the session being reduced to just sixty minutes.

A document handed to the media just ahead of qualifying lists a number of areas which have been investigated, and details all the work carried out - specifically mentioning eighteen of the circuit's twenty-two corners.

"The white line denoting the track edge has been moved one metre from the wall and the area behind it painted red and white with non-slip paint," the document reads in relation to the exit of Turn 3. Turns 5, 17 and 18 received the same treatment.

Elsewhere repair work was carried out to the existing kerbs to more rigidly fix them to the road. "The kerb has been replaced but with a shorter section, it has been more securely fastened using new bolts and epoxy resin," read the note against Turn 13.

Drivers had their first taste of the revised kerb layout in final practice on Saturday evening ahead of qualifying, both Lotus drivers reportedly happy with the changes.

The full release reads:

Following the removal or repair of kerbing prior to and during FP1 of the Singapore Grand Prix, the FIA has re-examined the following areas of the Marina Bay Circuit and carried out the additional adjustments listed below.

3 Exit: The white line denoting the track edge has been moved one metre from the wall and the area behind it painted red and white with non-slip paint

5 Entry: Checked for security

5 Apex: Checked for security

5 Exit: The kerb has been removed and the area between the track edge (white line) and the wall painted red and white with non-slip paint

7 Apex: The kerb itself remains unchanged but has been more securely fastened using new inserts in the track, new bolts and epoxy resin

7 Exit: The kerb itself remains unchanged but has been more securely fastened using new inserts in the track, new bolts and epoxy resin

8 Apex: Checked for security

9 Apex: Checked for security

10 Exit: Checked for security

11 Apex: Checked for security and repairs carried out

12 Apex: Checked for security and repairs carried out

13 Apex: The kerb has been replaced but with a shorter section, it has been more securely fastened using new bolts and epoxy resin

14 Entry: Checked for security

14 Apex: Checked for security

14 Exit: The white line denoting the track edge has been moved one and a half metres from the wall and the area behind it painted red and white with non-slip paint (It had been our intention to replace the kerb but satisfactory repairs proved impossible in the time available)

16 Apex: Checked for security

17 Apex: Checked for security

17 Exit: The kerb has been removed and the area between the track edge (white line) and the wall painted red and white with non-slip paint

18 Entry: The kerb has been removed and the area between the track edge (white line) and the wall painted red and white with non-slip paint

18 Apex: The kerb has been shortened and been more securely fastened using new bolts and epoxy resin