French, Cement Seal, Portland

Portland Cement Seal, Image & Found by Keith777.
Found in Northumberland.

A French Portland Cement bag seal.
One side has CIMENT PORTLAND and a possible fleur-di-lis curved around the outer border with DESVRES straight across the middle.
The other side has has LADESVROISE. curved around the border and in the middle a possible flower with a link attached?

Further information by Keith777:-
LADES = Cargo, VROISE = a town in Poland, DESVRES is a town near Boulogne France

Which led to:-
Ciments Françs
Cementing France in the 20th Century
Ciments Françs was formed as the Société des Ciments Françs et des Portland in Boulogne-sur-Mer in 1881. Joined by Compagnie des Portland, in Desvres, the two companies combined to form the Société des Ciments Françs in 1941. The company profited from France's postwar construction boom, as the country rebuilt from the damage caused by World War II, and entered into an extended period of economic growth that came to a peak during the 1960s. It was during this time, too, that Ciments Françs--the company would not, in fact, simplify its name until 1989--began to impose itself on the national market.

Also this:-

Cement and lime plant of the Company of Portland cement Famchon and Co., then new Company of Portland cement bolt Desvres (62)
Category: Cement, lime plant
Study area: Pas-de-Calais
Adresse : Gare (rue de la) 56
Construction period: 2nd half 19th century
Year: 1873
author(s): unknown
History: The plant was founded in 1873 and starting in 1874. Specializing in the manufacture of Portland cement artificial, it included six fours. In 1878, they are twelve in number. In 1881 the company took the name of the new Company of Portland cement Boulogne and operated until about 1975. Currently only the silos remain. Production in 1878 totaled 30 million pounds per year. There were between 150 and 200 workers in 1878.
Main structure: concrete
Cover (material): concrete cover, metal cover
Coverage (type) roof with long tails; domed roof, terrace
Status: abandoned industrial plant; remains private property
building unprotected MH
Type of study: industrial heritage (partial survey)
Survey date: 1993
rédacteur(s) : Van Bost Nathalie Editor (s): Nathalie Van Bost
N° notice : IA62000764 No record: IA62000764
© Inventaire général, 1993
File available: EAS inventory Nord-Pas-de-Calais
Hôtel Scrive - 1, rue du Lombard 59800 LILLE - 03.20.06.87.58 Hotel Scribe.

From Paul Cannon, "For other examples of the seal see PLOMBS DE SCELLES From this the reading should be ‘LA DESVROISE’. The source of the company information on this site would seem to be Inventaire général du patrimoine culturel From this it would seem that in 1901 the company name changed and incorporated ‘La Desvroise’ into its new name. See Delcampe.net and for images of the cement works see Usine des Ciments Français.

From Philippe Lanez, "See LA CIMENTERIE DE DESVRES EN CARTES POSTALES.