The U.K. Entertainment Retailers' Association (ERA) issued first half figures for 2010 that show small year on year increases in unit and value sales.

The trade group said sales of music and video products were "surprisingly resilient" in the first six months of the year.

For the six months compared to the same period in 2009, ERA said that music sales increased 1.7% by volume to 64.3 million units and 0.4% by value to £522.4 million ($801.9 million). Sales of CDs were down 9.1% by volume, but album downloads increased by 34%.

Lady Gaga's "The Fame" (Universal) may have been released in January 2009 in the U.K. but it was still able to become the biggest seller for the first half of 2010. ERA said it moved 719,517 copies in the first six months of the year, ahead of Alicia Keys' "The Element of Freedom" (J/Sony Music) on sales of 595,039.

Florence and the Machine's "Lungs" (Island/Universal) moved 587,412 and Paolo Nutini's Atlantic/Warner set "Sunny Side Up" sold 580,729 copies in the same period. Michael Buble's "Crazy Love" (Warner Music) was the fifth biggest seller with six-month sales of 394,238. There were no EMI titles in the top 10 albums for the first half of the year.

Video achieved an increase in sales of 0.6% by value to £852.5 million ($1.31 billion), despite a 1.4% decline in the number of units sold. That is explained by growing sales for Blu-ray products, which are more expensive than DVDs. ERA said Blu-ray volume sales are currently running 81.3% ahead of last year while sales of DVDs are down 7.7%.

The video games market remains tough for retailers: volumes were down 12.5% by volume to 23.8 million units and 10.1% by value to £532.6 million ($817.8 million). Ubisoft title "Just Dance" was the biggest seller - it moved 940,358 copies in six months.

Overall, the entertainment market generated sales of £1.89 billion ($2.9 billion) in the first six months (down 3.0% on the first half of 2009) on sales of 184.3m units (down 2.2% on the first half of 2009).

"Given tough high street trading and where we are in the videogames product cycle, these are creditable results and reflect the hard work and commitment of retailers who know they have to fight for every penny in this tough economic environment," said ERA director general Kim Bayley in a statement.

ERA's members, include bricks and mortar stores and digital retailers, account for around 90% of music, games and video sales.

The research is based on Official Charts Company and Chart-Track market data.