Must see: Modified McLaren F1 front wing for Spanish GP rule change

Comparing the front wings of the Monaco Grand Prix (above) and the Spain Grand Prix (below), a few differences stand out, especially the upper flap, which is the focus of the new regulation to reduce deflection.

Most noticeably, it stops slightly more abruptly on the side of the wing endplate, where it previously ended at a sharp point.

And if you look closely, you can see that the upper part has also received an extra arch support for an additional connection to the wing element directly below.

These appears to be modifications directly intended to prevent flexing. The weekend will reveal what the effect will be, something on which opinions vary considerably.

Some, like Ferrari team principal Fred Vasseur, who called it a potential "game changer", believe it could shake up the pecking order.

Mercedes boss Toto Wolff suggested the Italian team has been the most "conservative" out of the leading teams when it comes to flexi-wings.

However, others, such as McLaren team principal Andrea Stella, have played down the likely impact, arguing it will amount to no substantive change, let alone altering the balance of supremacy in F1.

Check out the side-by-side comparison of the McLaren's old and new front wings below with both changes highlighted.