UK charts: Portal 2 maintains number one spot

Portal 2 has remained on top of the UK charts, GFK Chart-Track has announced this morning.

It's the second week the Valve puzzler has held the number one spot since its launch over the Easter Bank Holiday period.

Mortal Kombat stays second this week, with Zumba Fitness in third. Codemasters' Operation Flashpoint: Red River moves up two from six to four. Black Ops rounds off the top five.

Full top ten is below. Last week's data is here.

1. Portal 2
2. Mortal Kombat
3. Zumba Fitness
4. Operation Flashpoint: Red River
5. Call of Duty: Black Ops
6. Lego Star Wars III: The Clone Wars
7. FIFA 11
8. Wii Fit Plus
9. Homefront
10. Just Dance 2

More soon.