It is a little embarrassing to say that there is a Beefeater restaurant, situated in a lovely 18th Century Public House, that is just a 10 minute drive from my house, and yet I had never tried it. But until yesterday, this was a true fact.  The Longford House is a fabulous old building which has recently had extensive renovations to make it a bright and airy modern restaurant, and on Sunday we went along to sample some of the delights of the current menu. The Beefeater menu is extensive, with a good mixture of steaks, pasta, salads and grills. On Sunday, it also has the option of Roasts on…