| Flag Illustration | 1) |
| Active | 1642 to 1644 |
| Country | England |
| Allegiance | Royalist |
| Conflicts | First Civil War |
| Type | Foot |
| Colonel | Marquis of Newcastle |
| Area Raised | Northumberland |
| Coat Colour | White |
| Flag Colour | Red?? |
| Flag Design | White Crosses? |
| Field Armies | Newcastle 1642-4 |
The Marquis of Newcastle’s own regiment of foot serving in his army until their destruction at Marston Moor
White coats in 1644, Royalist prisoners taken at York were said to have white coats with red and blue silk crosses on their sleeves by a Parliamentarian who went on to opine an ensigne wee conceive of some Po-ish regiment. According to the Northumberland and Durham Composition papers, in 1642 Newcastle had bought 3000 Scots blew bonnets to equip his infantry regiments, though how long these survived is unknown. The flag illustrated above represents eleven captured at Marston Moor that were described as 'red with white crosses'. Assuming that they were from the same regiment, Newcastle's is the prime candidate as it mustered fourteen companies in 1642 and no other regiment present is known to have exceeded ten companies. The evidence thererfore points to this design as the most likely for Newcastle's regiment but is in no way definite.
Newcastle's Regiment are re-enacted by the Marquess of Newcastle's Regiment of Foote of the Sealed Knot.