- 1.2m sq ft of development is scheduled to have been completed so far this year. 460,000 sq ft of this space remains available.
There is currently a further 2.3m sq ft under construction of which 1.9m sq ft is available.
- 1.2m sq ft is scheduled for completion in the next 12-months and 1.1m sq ft of this remains available.

- The top headline rent achieved in this cycle remains £135 per sq ft.
- Achievable rents for Grade A space decreased to £110 per sq ft in Q2 from £120 per sq ft in Q1 08 and have remained at £110 per sq ft in Q3.
- In the year to September 08 headline rental values have decreased by -18.5% from £135 per sq ft in Q3 07.

- Total potential supply including development sites and schemes where practical completion is estimated to be more than 12 months ahead is 5.1m sq ft.
- 79% of total potential supply is available for immediate occupation; the remaining 21% represents development sites or space under construction which will not be completed for at least another 12 months.
- 22% of immediately available space represents Grade A space currently under construction.

- 32% of available space represents offices of 10,000 sq ft or less.
- 72% of available space represents offices of 50,000 sq ft or less.
- 14% of available space represents offices of 100,000 sq ft or more.

- Q2’s transaction activity has risen from £186m - £295m.
- Q3 indicates that West End office investment decreased to £157m. But these figures are once again likely to be revised upwards Twelve months earlier in Q3 07 investment amounted to £958m.
- The yield on prime West End offices remained  at 5.25%. Twelve months earlier in Q3 07 the yield was 4.25%.