Ireland, still bearing the cypher of the reigning monarch at the time of the box's manufacture. All are now protected structures. The Department of Posts and Telegraphs continued installing similar pillar boxes and wall boxes, but with the initials SÉ (for Saorstát Éireann), a harp or the Department of Posts and Telegraphs P ⁊ T logo, instead of a monarchical cypher. Since 1984 An Post, the current Irish postal administration, has used their logo to adorn its pillar boxes. All Irish counties, such as County Wicklow, have placed their extant United Kingdom-era pillar boxes on their lists of protected structures, meaning they may not be replaced without special planning permission having first been obtained. In 1939 the IRA, as part of their S-Plan campaign, placed a number of bombs in post boxes in Britain. Later the Provisional IRA did so again in 1974. Queen Elizabeth II The next major design change came in 1968 with the introduction of the Type F pillar box. This was conceived by Vandyke Engineering and proposed to the Post Office as a cheaper alternative to the traditional cast box. It was fabricated in sheet steel with welded construction. However, the British climate did not suit the use of galvanised steel (a problem often seen with the 1940 and 1988 pattern of lamp box) and the Vandyke pillars soon began to rust badly. The very last one was removed from service at Colmore Row in Birmingham in 2002. In 1974 the Post Office experimented with a similar rectangular design known as Type G. This was made in traditional cast iron by the foundry of Carron Company near Falkirk, Scotland. It was an operational success, but the public disliked the "square" designs and petitioned the Post Office for a return to cylindrical boxes. The Post Office commissioned a new design of pillar box in 1980 from a panel of three competing designers. The competition was won by Tony Gibbs and his design, which was thought to be ultra-modern at the time, was designated Type K by the Post Office. Made in traditional cast iron, it stayed in production until 2000. Notable features included: replaceable lifting ring screwed into the dome of the box, body and roof of box cast as one piece, large easy-to-read collection time plate, all surface details and collection plate window recessed to give a perfect cylindrical outline, integral restrictor plate, know colloquially as