I'm guessing this is not a normal question in these parts. I have two kids and they have booster seats. With the booster seats placed where they need to be to fit the ISOfix fittings the belt buckle socket is almost covered by the seat and it's really hard to do the seat belt up. I've had a look at seat belt extenders but I'm not sure I trust a £3.50 device off ebay to secure my children. Notably, Halfords don't sell them. Any suggestions?
what we did when we had boosters is leave seatbelt allways buckled in and kids used to slip in the belt loop then pull the straps upwards to fasten them securely