Launched in February, Benacort spray “helps to prevent hayfever symptoms before they start”, offering “24-hour continuous relief” from nasal congestion, a runny nose and sneezing, McNeil claimed.

The “prescription-strength” steroid spray contains budesonide, which “blocks inflammatory signals”, the manufacturer said.

The product – which lasts for 120 sprays – can be used by adults in both nostrils every morning, or every morning and evening.

One Benacort 64 microgram nasal spray retails at £9.99.

To order, contact [email protected] or 0808 238 9783