Caiff busnesau sy'n gwerthu nwyddau'n uniongyrchol i'r cwsmeriaid sy'n eu defnyddio eu diffinio fel manwerthwyr. Yr ystadegyn allweddol ar gyfer manwerthu yw'r Mynegai Gwerthiannau Manwerthu (RSI), a gyhoeddir yn fisol. Mae data yn y RSI yn ymdrin â gwariant ar nwyddau yn unig (mewn siopau ac ar-lein). Mae data am wario ar wasanaethau ar gael ym Mynegai Gwasanaethau (IoS).
In the three months to September 2018, the quantity bought in retail sales increased by 1.2% when compared with the previous three months, with strong sales in “other stores” and online retailing.
The increase of 3.9% for the quantity of goods bought in “other stores” for the three months to September 2018 was the largest overall contributor to the growth in total retail sales, due largely to strong growth in watches and jewellery stores.
In September 2018, the quantity bought declined by 0.8% when compared with August 2018, due mainly to a large fall of 1.5% in food stores; the largest decline in food store sales since October 2015.