n.THE King of Thailand - no, not Yul Brynner - is this year celebrating his golden jubilee. King Bhumidol Adulyadej is the world's oldest ruling monarch. It's a bit late now to make it to Thailand for the exact day of his jubilee (June 9), but elaborate royal, state, and religious ceremonies will continue to be held throughout the rest of the year. Special offers in honour of the golden jubilee are available to tourists visiting Thailand. Ask at your travel agency for details.

n LUNN Poly is offering discounts of 20% on cruises on P&O's Canberra and Oriana cruise ships sailing from Southampton between now and November. With Lunn Poly's interest-free credit scheme, customers can book now and not have to start paying for six months.

Among the bargains available using this offer are the 15-night ``Greek Idyll'' cruise on the Oriana which sails on August 16 and visits Gibraltar, Loutraki, Corfu, Preveza, Sicily, and Majorca. The cost is #2556 per person (down from #3195). For #716 per person passengers can sail on the Canberra's nine-night ``Autumn Getaway'' which leaves on November 21, and calls at Vigo (in Spain), Lanzarote, Tenerife, and Madeira. For further details call the Lunn Poly Cruise Hotline on 01203 223300.

n AHOY to anyone considering a Caribbean cruise. The Cruise Network is offering a nine-day holiday on the maiden voyage of the Royal Caribbean Cruise Liner ``Grandeur of the Seas'' from a starting price of #975 per person. Passengers are flown from London to Miami before sailing to Labadee (Royal Caribbean Cruise Line's private island), San Juan, St Thomas, and Coco Cay (another private island). Sailing begin on December 14. For more details call The Cruise Network on 01772 727 222.

n AND if it's a cruising that you're musing, Page & Moy has published a guide to enable families to select the cruise which will best suit them.

Many ships, for example, discourage activities for children, while others make them a feature of the holiday. Page & Moy's ``Guide to Cruising With Children'' includes an easy-to-read chart with information about which cruise liners offer special rates for families, which offer free places for kids and whether there are special services such as baby sitting, a staffed playroom and provision of cots and high chairs.

The company - which, as booking agent for cruise holidays, is extremely knowledgeable about the different types of cruises available - has also produced a ``Cruise Tips'' leaflet designed to answer questions usually posed by first-time cruisers. For a free copy of either pamphlet, or for advice or reservations, call 0116 250 7722. (Lines are open seven days a week; from 8am-9pm between Monday and Friday; from 8am-5pm on Saturdays, and from 10am-4pm on Sundays and Bank Holidays.

n THEMED holidays are becoming increasingly popular, and Kuoni Travel has just launched a new ``Lifestyle'' series of holidays which cover specific fields of interest. Among the holidays on offer this summer are Opera and Classical Music events in Australia, a Caribbean jazz cruise and a holiday at the famous Montreux Jazz Festival; food tours to Thailand, Sri Lanka, Israel, and Mauritius, and breaks at the new Disney Institute. For more information call 01306 744153.

n BACK in Britain, Queens Moat Houses Hotels have launched a new ``Classic Weekends'' brochure, valid until April 1997. Among the features of a ``classic weekend'' at one of the company's 75 British hotels are late check-out at 6pm on a Sunday evening for guests who stayed on the Saturday night and a selection of gifts in your room on arrival. Queens Moat Hotels vary in style from modern city centre hotels to traditional inns and country house hotels. At most of the hotels, use of the leisure facilities are free to guests.

Children aged under six years of age can eat and stay free of charge, while children up to the age of 15 can stay free as long as they share their parents' room. Guests travelling alone are catered for: there are no single supplements charged at weekends at any of the hotels. Prices start at #30 per person per night for bed and breakfast or from #42, including dinner. Details of places to visit in the area are given in the brochure, which is available by calling Queens-Line UK Reservations on 0645 213214.

n AMATEUR sleuths may be interested to learn about the Murder and Mystery Weekend at the Maids Head Hotel in Norwich from July 5-7. The weekend costs #149 per person and the price includes one fake murder (to be committed during a specially themed dinner), two nights' half board accommodation, a guided walking tour of the city and a welcome Bucks Fizz reception. To book, call the Maids Head Hotel on 01603 209955.

n UNIJET has just brought out its ``Florida Sunbuster'' brochure. Covering holidays to be taken between now and October, the brochure features a selection of the most popular hotels from its main ``Summer Florida'' programme, but at reduced prices of up to #100 per adult for fly-drives and #40 per adult for holidays. Child reductions of up to #20 on first child prices and #100 on second child prices are also available.

The brochure's lead-in price is now #299 for 14 nights fly-drive, #389 for 14 nights room only at the Best Western Hotel in Kissimmee and #419 for a twin centre holiday in Orlando and the Gulf Coast. Between June 19 and July 17 and August 28 and October 9 there are additional weekly flights to Orlando from Glasgow, and there are fortnightly flights from Stanstead all summer. For further information call Unijet America Reservations on 01444 459191.