Question: "Colin the Caterpillar" is a chocolate of which type of sponge cake roll filled with whipped cream, jam, or icing, sold by British store Marks & Spencer?

Context articles: Lamington
Princess cake
Trifle
Cheesecake
Icebox cake
Whipped cream
Éclair
Swiss roll
Whipped-cream charger
Colin the Caterpillar

A lamington is an Australian cake, made from squares of sponge cake coated in an outer layer of chocolate (or sometimes raspberry) sauce and rolled in desiccated coconut.
 The thin mixture is absorbed into the outside of the sponge cake and left to set, giving the cake a distinctive texture.
 A common variation has a layer of cream or strawberry jam between two lamington halves.
A princess cake ("prinsesstårta" in Swedish) is a traditional Swedish layer cake or torte consisting of alternating layers of airy sponge cake, pastry cream, and a thick-domed layer of whipped cream.
 This is topped by marzipan, giving the cake a smooth rounded top.
 The marzipan overlay is usually green, sprinkled with powdered sugar, and often decorated with a pink marzipan rose.
Trifle in English cuisine is a dessert made with fruit, a thin layer of sponge fingers or sponge cake soaked in sherry or another fortified wine, and custard.
 It can be topped with whipped cream.
 The fruit and sponge layers are suspended in fruit-flavoured jelly, and these ingredients are usually arranged to produce three or four layers.
 The contents of a trifle are highly variable; many varieties exist, some foregoing fruit entirely and instead using other ingredients such as chocolate, coffee or vanilla.
Cheesecake is a sweet dessert consisting of one or more layers.
 The main, and thickest layer, consists of a mixture of soft, fresh cheese (typically cream cheese or ricotta), eggs, and sugar; if there is a bottom layer it often consists of a crust or base made from crushed cookies (or digestive biscuits), graham crackers, pastry, or sponge cake.
 It may be baked or unbaked (usually refrigerated).
 Cheesecake is usually sweetened with sugar and may be flavored or topped with fruit, whipped cream, nuts, cookies, fruit sauce, or chocolate syrup.
 Cheesecake can be prepared in many flavors, such as strawberry, pumpkin, key lime, chocolate, Oreo, chestnut, or toffee.
An icebox cake (American) or chocolate ripple cake/log (Australian) is a dessert consisting of whipped cream and chocolate wafers.
 The back-of-the-box recipe on Nabisco Famous Chocolate Wafers indicates that the wafers are stacked to form a log with whipped cream cementing them together, and then the log is laid on its side.
 A second log is formed and the two are set side-by-side and more whipped cream covers the exterior.
 The cake is then left overnight in the refrigerator (or "icebox").
 The wafers absorb moisture from the whipped cream and the whole can be served in slices.
 The dessert is usually served by cutting it into slices at a 45-degree angle, so bands of chocolate and cream are visible across each slice.
 The traditional wafers are the thin and dark Nabisco Famous Chocolate Wafers, but they may be hard to find in some areas so other cookies are sometimes substituted.
Whipped cream is cream that is whipped by a whisk or mixer until it is light and fluffy.
 Whipped cream is often sweetened and sometimes flavored with vanilla.
 Whipped cream is often called Chantilly cream or crème Chantilly (] ).
An éclair is an oblong pastry made with choux dough filled with a cream and topped with icing.
 The dough, which is the same as that used for profiterole, is typically piped into an oblong shape with a pastry bag and baked until it is crisp and hollow inside.
 Once cool, the pastry is then filled with a vanilla-, coffee- or chocolate-flavoured custard ("crème pâtissière"), or with whipped cream, or chiboust cream; and then iced with fondant icing.
 Other fillings include pistachio- and rum-flavoured custard, fruit-flavoured fillings, or chestnut purée.
 The icing is sometimes caramel, in which case the dessert may be called a bâton de Jacob.
A Swiss roll, jelly roll, or cream roll is a type of sponge cake roll filled with whipped cream, jam, or icing.
A whipped cream charger (also called whippits, whippets (from the brand name Whip-It), nossies, nangs, or chargers) is a steel cylinder or cartridge filled with nitrous oxide (NO) that is used as a whipping agent in a whipped cream dispenser.
 The narrow end of a charger has a foil covering which is broken to release the gas.
 This is usually done by a sharp pin inside the whipped cream dispenser.
 The nitrous oxide in chargers is also used as an oxidizer in hybrid model rocket engines.
"Colin the Caterpillar" is a chocolate roll cake sold by British store Marks & Spencer.
 More than 7 million cakes have been sold since it was introduced in 1990.