Summary of investigation was "...consistent with minor settlement of the lintel..." There was no evidence that it is related to foundation movement.
The solution is to either repoint now or later. As we are looking at selling the advise was to leave for now for the reasons @KenGMac mentioned- repointing can make it look like you are trying to hide something
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local