{"dataset":"MainBuyer UK price observations","market":"GB","market_name":"United Kingdom","methodology":"Each observation is stored only when MainBuyer has a timestamped checked retailer offer. Missing days are not interpolated or invented. Historical low, high and median figures use recorded in-stock observations only.","observations":[{"currency":"GBP","in_stock":true,"observed_at":"2026-10-21T03:10:03+00:00","price":"109.99","retailer":"Amazon UK","source_kind":"offer_check","source_url":"https://www.amazon.co.uk/dp/B09JP61PL8?maas=maas_adg_api_589335864481531507_static_12_201&ref_=aa_maas&tag=maas&aa_campaignid=PB5863fbda61f70d67c326a43701a450ef_59386d657730&aa_adgroupid=dee2daf4dcae268902f8e801ee4d2916_PBSEP_!!!affid!!!_118045_&aa_creativeid=21c6oC_bW2UWOTP28lC7HDUNWBP4h1irxTpCYqLaXGx54lOA_c"}],"product":{"brand":"Inofia UK","evidence_url":"https://mainbuyer.com/evidence/products/inofia-memory-foam-mattress-topper-single-3-inch-gel-bed-topper-with-cover-b09jp61pl8/prices","gtin":null,"id":19066,"model_number":null,"name":"Inofia Memory Foam Mattress Topper Single, 3 Inch Gel Bed Topper with Cover","product_url":"https://mainbuyer.com/product/inofia-memory-foam-mattress-topper-single-3-inch-gel-bed-topper-with-cover-b09jp61pl8","urn":"MB-AWIN-GB-B09JP61PL8"},"summary":{"currency_code":"GBP","currency_symbol":"\u00a3","has_history":true,"historical_high":"109.99","historical_low":"109.99","last_observed_at":"2026-10-21T03:10:03+00:00","low_30d":"109.99","low_90d":"109.99","median_price":"109.99","observation_count":1,"priced_observation_count":1,"retailer_count":1,"span_days":0,"tracked_since":"2026-10-21T03:10:03+00:00"}}