Thanks very much for the question. Well, firstly, I am confident about our progress in Europe. And as we've noted previously, in Europe, the process for reimbursement pricing and launch is both complicated and it varies country by country. It's important to remember that last year, we installed new leadership across the region with a new strategy for Europe. That had some really key focus areas: firstly, targeted patient and customer segmentation at launch focusing on the highest risk patients, where the urgency to treat is the highest. Secondly, really prioritizing and optimizing our resource, aggressively focused on where we see the near-term significant opportunities and thirdly, enhancing and being flexible with our value proposition to address specific country payer needs.
While we would all like to see faster update, we're encouraged by the progress in making in Europe with 35% revenue growth and 65% in market sales growth in quarter 1 versus quarter 4 2023. At a country level, we can see that our new strategy is working, albeit at a different pace aligned to each market dynamic. Specifically in Spain, this is really an excellent case study demonstrating the value of VAZKEPA in Spain as well as across the region, and we're seeing a fast uptake. 91% in patients on therapy in quarter 1, 2024 versus quarter 4 2023.
In the U.K., we are also seeing our new strategy work, albeit in a slower uptake market. With the team focused on building momentum in key accounts, we see a 28% increase in patients on therapy in quarter 1, 2024 versus quarter 4 2023. Again, taking a step back, underpinning all of this, looking at our long term, we've successfully secured additional patent protection out in 2039, which really gives us the confidence to invest and our belief around the future uptake, which enhances the value of our business.