Online retail sales grew 15% in October against last year, demonstrating consistently high growth over the past three months.

The IMRG Capgemini e-Retail Sales Index revealed the 15% year-on-year increase, which follows an 18% jump in August and a 20% increase in September.

Year-to-date online sales have advanced 16% against 13% the same time last year.

In addition in October etail conversion rates hit 4.7%, the highest since November 2012.

IMRG chief information officer Tina Spooner said: “The month-on-month growth between September and October was actually far lower than is usual, at just 0.5% compared with the rate of 4-8% we have seen over the past five years.

“However, this is following the strongest online sales growth recorded between August and September in 13 years. Coming off the back of a strong comparator last October, the performance is still strong and bodes well for a positive Christmas for online retail.”

The clothing sector recorded its lowest growth in 2013, rising just 9.6%, down 4% on the previous month. Electricals experienced their highest annual growth in the year as new product launches, such as the iPhone5 and Tesco’s Hudl tablet continued to boost sales.