child seat advice

[dba7108]

can any parents help. Ive looked at the government website but it is all vague stating children must be "secured safely" which doesn't really help.

Niece & Nephews are coming over from abroad for 2 months in the summer. I have a 7 seater available so plenty space.
They are aged 4 & 7 boys 9,10 girls

What seats do they need? All child seats or can they use booster?

thanks

[robdcfc]

Type of Child Restraint Weight Range Approx. Age Range
Rearward-facing baby seat Group 0
0 - 10kg (22 lbs) Birth to 6-9 months
Group 0+
0 - 13kg (29 lbs) Birth to 12-15 months
Combination seat (Rearward and Forward-facing) Group 0+ and 1
0-18 kg (40 lbs) Birth - 4 years
Group 0+, 1 & 2 (55 lbs)
Birth to 25 kg Birth to 6 years
Forward-facing child seat Group 1
9-18 kg (20 - 40 lbs) 9 months - 4 years
Group 1, 2 and 3
9 - 36 kg (20 - 79 lbs) 1 to 11 years
High-backed Booster Seat Group 2
15 - 25 kg (33 - 55 lbs) 4 to 6 years
High-backed Booster Seat Group 2 and 3
15 - 36 kg (33 - 79 lbs) 4 to 11 years
Booster Cushion Group 2 and 3
15 - 36 kg (33 - 79 lbs) 4 - 11 years
Booster Cushion Group 3
22 - 36 kg (48 - 79 lbs) 6 - 11 years