I read this and looks like it is legally all good

Springs and shock absorbers
• the springs or shock absorbers are direct replacements, and
• replacement springs fit and maintain contact with un-modified OE seats throughout full suspension travel, and
• replacement springs are self-retaining in their seats at full extension, without the use of non‑standard devices such as wire-ties, straps, or external spring locators, and
• replacement springs have not been heated or cut, and
• springs and spring seats are not height adjustable (unless OE), and
• replacement shock absorbers fit un-modified OE mountings, and
• suspension maintains sufficient travel for safe operation when fully laden, and
• suspension components maintain sufficient clearance from unmodified bumpstops when fully laden, and
• a minimum of 100 mm ground clearance exists below any part of the vehicle structure, or any steering, braking, or suspension component1, and
• the normal relationship between front and rear suspension height is not unduly affected.