Starts Saturday 3 October 2026 at 9pm UK time (BST); ends Sunday 4 October at 10pm. No minimum quantity. Starts at 25% off and drops by one percentage point each hour for 25 hours. Excludes laboratory essentials and pre-selected Research Stacks. We automatically apply the better of this sale and the research-set saving; they do not combine. Remove other discount codes to use the sale. Basket prices are not reserved: review the current total before placing your order.