Is it possible to get add-on cover for teaching the technique in association with activities such as hore-riding and ice-skating?

No, not with Howden and the STAT Standard Scheme paid for through the membership fee.

However you can discuss your individual needs with Howden's development team to establish if a solution is available to you separately. This is independent of the insurance covered by your STAT membership and may require you to pay an additional fee to Howden.