National Lottery sales have increased for the second year running but independent retailers could face competition from supermarkets and interactive channels.

Lottery operator Camelot revealed a £150m increase in total sales to £4.8bn for the year to end March 31 yesterday.

Camelot said that the move to interactive distribution channels such as the internet, texting and interactive television had bucked the trend.

The group also said that an ongoing trial with Tesco allowing Tesco customers to buy a lottery ticket when they purchase their shopping had been “very positive” and could be extended to other supermarket chains in the future.

However, Camelot remained silent when asked how this trial could affect independent retailers.