| Tariff Dates | Thistle | Juniper |
| 2008 | ||
| Mar 15 - Mar 22 | £260 | £210 |
| Mar 22 - Apr 19 | £335 | £285 |
| Apr 19 - May 24 | £295 | £245 |
| May 24 - May 31 | £405 | £355 |
| May 31 - June 21 | £375 | £325 |
| June 21 - July 05 | £420 | £370 |
| July 05 - Aug 23 | £495 | £445 |
| Aug 23 - Aug 30 | £440 | £380 |
| Aug 30 - Sept 06 | £360 | £310 |
| Sept 06 - Sept 27 | £320 | £270 |
| Sept 27 - Oct 25 | £280 | £230 |
| Oct 25 - Nov 01 | £310 | £260 |
| Nov 01 - Dec 20 | £250 | £195 |
| Dec 20 - Dec 27 | £405 | £355 |
| Dec 27 - Jan 03 | £465 | £405 |