Why don't Eastern operate routes to Europe??
Do you mean from HUY, or in general? If the former, probably because there just isn't the demand - at least not at the price Eastern will charge for their tickets. The Humber region, like Teesside, has obvious connections with the oil industry, so there's a demand for business travel to Aberdeen, and a variety of companies who will pay good money for it.
Like it or not, and I'm sure there are HUY fans who will swear otherwise, the Aberdeen route has very specific attributes which allow Eastern to exploit it as a niche. I really don't see significant
business only demand for any other routes. Most travel to European destinations, business and leisure, can probably be catered for via Amsterdam.