Complex sentence: In recent years, retailers, politicians and academics in the United Kingdom have expressed concern at the potentially unfair and damaging economic advantage this affords to retailers based in the Channel Islands who are able to offer the same products as UK retailers but at significantly lower prices.
Split into simpler sentences: In recent years, retailers, politicians and academics in the United Kingdom have expressed concern at the unfair and damaging economic advantage that this pricing affords to retailers based in the Channel Islands. These retailers are able to offer the same products as UK retailers but at significantly lower prices.