This award seat prices at 88,000 MileagePlus miles compared to the roughly 140,000 miles United typically charges for transatlantic business class. The $32 in taxes and fees is also notably low for a London-bound flight, since you'll avoid the much steeper surcharges that apply when departing the UK.
The catch: there's only one seat available at this price. That makes this a better fit for a solo traveler or someone looking to split up a family redemption across different dates or cabins. If you need multiple business class seats together, this particular availability won't work.
July 5 falls right after the Independence Day holiday weekend in the US, so this could work well as the outbound leg of a summer trip to the UK or Europe. You'd be arriving fresh in London on July 6, ready to start your trip without the fatigue of an economy red-eye.
A practical note: award space like this can disappear quickly, especially with only one seat. If your dates are flexible and you have the miles available, it's worth searching nearby dates to see if similar pricing exists on other departures.
How to book
Search for award availability and book directly through United at united.com.